Date: 5/24/2021
Form: 10-Q - Quarterly Report
Document and Entity Information - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
May 21, 2021 |
|
| Document and Entity Information [Abstract] | ||
| Document Type | 10-Q | |
| Document Period End Date | Mar. 31, 2021 | |
| Entity Registrant Name | Biostage, Inc. | |
| Entity Current Reporting Status | Yes | |
| Entity Interactive Data Current | Yes | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Small Business | true | |
| Entity Emerging Growth Company | false | |
| Entity Shell Company | false | |
| Entity Common Stock, Shares Outstanding | 9,388,407 | |
| Entity Central Index Key | 0001563665 | |
| Current Fiscal Year End Date | --12-31 | |
| Document Fiscal Year Focus | 2021 | |
| Document Fiscal Period Focus | Q1 | |
| Amendment Flag | false | |
| Trading Symbol | BSTG |
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- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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- Definition Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY. No definition available.
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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD. No definition available.
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- Definition Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. No definition available.
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- Definition Indicate if registrant meets the emerging growth company criteria. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicates that the company is a Smaller Reporting Company (SRC). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Trading symbol of an instrument as listed on an exchange. No definition available.
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- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares |
Mar. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| CONSOLIDATED BALANCE SHEETS | ||
| Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized | 2,000,000 | 2,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 60,000,000 | 60,000,000 |
| Common stock, shares issued | 9,388,407 | 9,388,407 |
| Common stock, shares outstanding | 9,388,407 | 9,388,407 |
| X | ||||||||||
- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| CONSOLIDATED STATEMENTS OF OPERATIONS | ||
| Revenues | $ 0 | $ 0 |
| Operating expenses: | ||
| Research and development | 473 | 643 |
| Selling, general and administrative | 522 | 1,253 |
| Total operating expenses | 995 | 1,896 |
| Operating loss | (995) | (1,896) |
| Other income (expense): | ||
| Grant income | 118 | 0 |
| Change in fair value of warrant liability | 3 | (100) |
| Total other income (expense), net | 121 | (100) |
| Net loss | $ (874) | $ (1,996) |
| Basic and diluted net loss per share | $ (0.09) | $ (0.24) |
| Weighted-average common shares, basic and diluted | 9,388 | 8,287 |
| X | ||||||||||
- Definition The amount of grant income which is recognized based on timing of when qualified research and development costs are incurred and recorded and classified as grant income in other income (expense), net. No definition available.
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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| X | ||||||||||
- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). No definition available.
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- Definition The information pertaining to issuance of common stock and warrants to purchase common stock share, net of offering costs. No definition available.
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| X | ||||||||||
- Definition The information pertaining to issuance of common stock and warrants to purchase common stock value, net of offering costs. No definition available.
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| X | ||||||||||
- Definition Number of shares of stock issued during period attributable to fully vested common stock awards. No definition available.
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| X | ||||||||||
- Definition Number of shares issued during the period common stock upon warrant exercises. No definition available.
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| X | ||||||||||
- Definition Value of stock of share issued during period attributable to fully vested common stock awards. No definition available.
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| X | ||||||||||
- Definition It represents the amount of stock issued during period value of common stock upon warrant exercises No definition available.
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| X | ||||||||||
- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of shares issued which are neither cancelled nor held in the treasury. No definition available.
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- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| OPERATING ACTIVITIES | ||
| Net loss | $ (874) | $ (1,996) |
| Adjustments to reconcile net loss to net cash used in operating activities: | ||
| Share-based compensation expense | 130 | 588 |
| Depreciation | 43 | 48 |
| Change in fair value of warrant liability | (3) | 100 |
| Changes in operating assets and liabilities: | ||
| Grant receivable | 55 | 0 |
| Prepaid expenses and other current assets | 136 | 98 |
| Accounts payable | 50 | (14) |
| Accrued and other current liabilities | (97) | 82 |
| Net cash used in operating activities | (560) | (1,094) |
| INVESTING ACTIVITIES | ||
| Net cash used in investing activities | 0 | 0 |
| FINANCING ACTIVITIES | ||
| Proceeds from issuance of common stock and warrants | 0 | 559 |
| Proceeds from exercise of warrants | 0 | 428 |
| Net cash provided by financing activities | 0 | 987 |
| Net decrease in cash and restricted cash | (560) | (107) |
| Cash and restricted cash at beginning of period | 963 | |
| Cash and restricted cash at end of period | $ 516 | $ 856 |
| X | ||||||||||
- Definition Gross amount of expense (income) related to adjustment to fair value of warrant liability before deducting issuance cost. No definition available.
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period pertaining to grant receivables. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in accrued expenses, and obligations classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in prepaid expenses, and assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Overview and Basis of Presentation |
3 Months Ended |
|---|---|
Mar. 31, 2021 | |
| Overview and Basis of Presentation | |
| Overview and Basis of Presentation | 1. Overview and Basis of Presentation Overview Biostage, Inc. (Biostage or the Company) is a biotechnology company developing bioengineered organ implants based on the Company’s novel Cellframe ™ and Cellspan ™ technology. The Company’s technology is comprised of a proprietary biocompatible scaffold, which is the foundation of the Company’s Cellframe technology, that is seeded with the recipient’s own mesenchymal stromal cells to form the Company’s Cellspan implant. The Company believes that this technology may provide surgeons a new paradigm to address life-threatening conditions of the esophagus, bronchus, and trachea due to congenital abnormalities, diseases, infections and traumas. Since inception, the Company has devoted substantially all of its efforts to business planning, research and development, recruiting management and technical staff, and acquiring operating assets. The Company has one business segment and does not have significant costs or assets outside the United States. On October 31, 2013, Harvard Bioscience, Inc. (Harvard Bioscience) contributed its regenerative medicine business assets, plus $15 million of cash, into Biostage (formerly “Harvard Apparatus Regenerative Technologies” at time of spin-off.) On November 1, 2013, the spin-off of the Company from Harvard Bioscience was completed. On that date, the Company became an independent company that operates the regenerative medicine business previously owned by Harvard Bioscience. The spin-off was completed through the distribution of all the shares of common stock of Biostage to stockholders of Harvard Bioscience (the “Distribution”). The Company’s common stock is currently traded on the OTCQB Venture Market under the symbol “BSTG”. Going Concern The Company has incurred substantial operating losses since its inception, and as of March 31, 2021 has an accumulated deficit of approximately $69.8 million and will require additional financing to fund future operations. The Company expects that its operating cash on-hand as of March 31, 2021 of $0.5 million, along with cash proceeds of approximately $0.3 million received in May of 2021 from existing investors, will enable it to fund its operating expenses and capital expenditure requirements into the third quarter of 2021. Therefore, these conditions raise substantial doubt about the Company’s ability to continue as a going concern. The Company will need to raise additional funds to fund its operations. In the event the Company does not raise additional capital from outside sources in the second quarter, it may be forced to curtail or cease its operations. Cash requirements and cash resource needs will vary significantly depending upon the timing of the financial and other resource needs that will be required to complete ongoing development, pre-clinical and clinical testing of products, as well as regulatory efforts and collaborative arrangements necessary for the Company’s products that are currently under development. The Company is currently seeking and will continue to seek financings from other existing and/or new investors to raise necessary funds through a combination of public or private equity offerings. The Company may also pursue debt financings, other financing mechanisms, research grants, or strategic collaborations and licensing arrangements. The Company may not be able to obtain additional financing on favorable terms, if at all. The Company’s operations will be adversely affected if it is unable to raise or obtain needed funding and such circumstance may materially affect the Company’s ability to continue as a going concern. The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going concern and therefore, the consolidated financial statements do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amount and classifications of liabilities that may result from the outcome of this uncertainty. Basis of Presentation The consolidated financial statements reflect the Company’s financial position, results of operations and cash flows in conformity with accounting principles generally accepted in the United States (GAAP). Use of Estimates The preparation of our consolidated financial statements requires us to make estimates, judgments and assumptions that may affect the reported amounts of assets, liabilities, equity, expenses and related disclosures. On an ongoing basis we evaluate our estimates, judgments and methodologies. We base our estimates on historical experience and on various other assumptions that we believe are reasonable, the results of which form the basis for making judgments about the carrying values of assets, liabilities and equity and the amount of expenses. Actual results may differ from these estimates. Net Loss Per Share Basic net loss per share is computed using the weighted average number of common shares outstanding during the period. Diluted net loss per share is computed using the sum of the weighted average number of common shares outstanding during the period and, if dilutive, the weighted average number of potential shares of common stock, including the assumed exercise of stock options, warrants, and the impact of unvested restricted stock. The Company applies the two-class method to calculate basic and diluted net loss per share attributable to common stockholders as its warrants to purchase common stock are participating securities. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise would have been available to common stockholders. However, the two-class method does not impact the net loss per share of common stock as the Company has been in a net loss position and the warrant holders do not participate in losses. Basic and diluted shares outstanding are the same for each period presented as all common stock equivalents would be antidilutive due to the net losses incurred. Unaudited Interim Financial Information The accompanying interim consolidated balance sheet as of March 31, 2021, consolidated interim statements of operations and stockholders’ equity for the three months ended March 31, 2021 and 2020, and consolidated statements of cash flows for the three months ended March 31, 2021 and 2020 are unaudited. The interim unaudited consolidated financial statements have been prepared in accordance with GAAP on the same basis as the annual audited financial statements and, in the opinion of management, reflect all adjustments necessary for a fair statement of the Company’s financial position as of March 31, 2021, its consolidated results of operations, consolidated statement of cash flows, and consolidated stockholders’ equity for the three-month periods ended March 31, 2021 and 2020. The financial data and other information disclosed in these notes related to the three-month periods ended March 31, 2021 and 2020 are unaudited. The results for the three months ended March 31, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021, any other interim periods or any future year or period. |
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- Definition No definition. No definition available.
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- Definition The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Summary of Significant Accounting Policies |
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| Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements Summary of Significant Accounting Policies The accounting policies underlying the accompanying unaudited consolidated financial statements are those set forth in Note 2 to the consolidated financial statements for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10‑K. SBIR Award Grant income is recognized when qualified research and development costs are incurred and recorded in other income (expense), net in the consolidated statements of operations. When evaluating grant revenue from the SBIR grant, the Company considered accounting requirements under the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 606, Revenue From Contracts With Customers. The Company concluded that ASC 606 did not apply as there is no exchange of goods or services or an exchange of intellectual property between the parties; therefore, the Company presents grant income in other income. On March 28, 2018, the Company was awarded a Fast-Track Small Business Innovation Research (SBIR) grant by the Eunice Kennedy National Institute of Child Health and Human Development (NICHD) to support testing of pediatric Cellspan™ Esophageal Implants (CEIs). The award for Phase I provided for the reimbursement of approximately $0.2 million of qualified research and development costs which was received and recognized as grant income during 2018. On October 26, 2018, the Company was awarded the Phase II Fast-Track SBIR grant from the Eunice Kennedy NICHD grant aggregating $1.1 million to support development, testing, and translation to the clinic through September 2019 and represented years one and two of the Phase II portion of the award. On August 3, 2020, the Company was awarded a third year of the Phase II grant totaling $0.5 million for support of development, testing, and translation to the clinic covering qualified expenses incurred from October 1, 2019 through September 30, 2020. In September of 2020, the Company filed and was granted a one year, no-cost extension for the Phase II grant period extending through September 30, 2021. For the three months ended March 31, 2021, the Company recognized $0.1 million of grant income, from Phase II of the SBIR grant. The aggregate SBIR grant to date provides a total award of $1.8 million, of which, approximately $1.4 million has been recognized through March 31, 2021. The Company did not recognize any grant income during the three months ended March 31, 2020. Restricted Cash Restricted cash consists of $50,000 held as collateral for the Company’s credit card program as of March 31, 2021 and December 31, 2020. The Company’s statements of cash flows include restricted cash with cash when reconciling the beginning-of-period and end-of-period total amounts shown on such statements. A reconciliation of the cash and restricted cash reported within the balance sheet that sum to the total of the same amounts shown in the statements of cash flows is as follows:
Recently Adopted Accounting Pronouncements Accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s financial statements upon adoption. |
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- Definition The entire disclosure for all significant accounting policies of the reporting entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Notes Payable |
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| Notes Payable | |
| Notes Payable | 3. Notes Payable On May 4, 2020, the Company obtained a loan (Loan) from the Bank of America (Lender) in the aggregate amount of $0.4 million, pursuant to the Paycheck Protection Plan (PPP), established as part of the CARES Act. The Loan is evidenced by a promissory note dated May 4, 2020 issued by the Company and will accrue interest at a fixed interest rate of 1% per annum from the funding date of May 4, 2020. Payments of principal and interest have been deferred since the funding under the original terms of the promissory note. However, the Loan and accrued interest may be forgivable at the conclusion of this period. Under the terms of the PPP, certain amounts of the Loan may be forgiven if they are used for qualifying expenses as described in the CARES Act. The terms of the promissory note, including eligibility and forgiveness, may be subject to additional requirements adopted by the SBA. Any unforgiven portion of the PPP loan, including principal and interest, will mature on May 4, 2022 and will be required to be payable monthly. The Note may be prepaid by the Company at any time prior to maturity with no prepayment penalties. The Company has accounted for the loan under FASB ASC 470, Debt. Repayment amounts due within one year have been recorded as current liabilities, and the remaining amounts due in more than one year as long-term liabilities. On December 18, 2020, the Company submitted the loan forgiveness application for the entire borrowings of $0.4 million to the Lender and was notified on January 7, 2021 that the application was submitted to the Small Business Administration (SBA) for review. The SBA had up to 90 days from the date of submittal to make a final decision on loan forgiveness. The Company has yet to be notified of the SBA’s forgiveness decision. If the Company is successful in receiving forgiveness for any portion of the loan used for qualifying expenses, those amounts will be recorded as a gain upon extinguishment. |
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- Definition The entire disclosure on notes payable. No definition available.
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Capital Stock |
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| Capital Stock | 4. Capital Stock During the three months ended March 31, 2020, the Company issued a total of 151,027 shares of our common stock at a purchase price of $3.70 per share and warrants to purchase 151,027 shares of common stock at an exercise price of $3.70 per share to a group of investors for aggregate gross and net proceeds of approximately $0.6 million, of which, $0.5 million and $0.1 million was allocated to the common stock and warrants, respectively. The Company has classified these warrants on its consolidated balance sheets as equity and valued using the Black-Scholes model based on the following weighted average assumptions:
During the three months ended March 31, 2020, the Company also issued 214,000 shares of our common stock to a group of investors in connection with the exercise of 214,000 previously issued warrants at $2.00 per share for aggregate gross and net proceeds of approximately $0.4 million. During the three months ended March 31, 2020, the Company issued a total of 11,950 shares of our common stock to employees due to the vesting of restricted stock units and issuance of a common stock award. |
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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Fair Value Measurements |
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| Fair Value Measurements | 5. Fair Value Measurements Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes a valuation hierarchy for disclosure of the inputs to the valuations used to measure fair value that prioritizes the inputs into three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the Company’s own assumptions used to measure assets and liabilities at fair value. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The Company had no assets or liabilities classified as Level 2 as of March 31, 2021 and December 31, 2020. The Company’s restricted cash that serves as collateral for the Company’s credit card program is held in a demand money market account and is measured at fair value based on quoted prices, which are Level 1 inputs. The Company classifies warrants to purchase common stock that are accounted for as liabilities as Level 3 liabilities, as discussed below. The following table presents a reconciliation of the Company’s liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2021:
The Company has re-measured the warrant liability to estimated fair value at inception, prior to modification and at each reporting date using the Black-Scholes option pricing model with the following weighted average assumptions:
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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Share-Based Compensation |
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| Share-Based Compensation | 6. Share-Based Compensation Biostage Amended and Restated Equity Incentive Plan The Company maintains the Amended and Restated Equity Incentive Plan (the Plan) for the benefit of certain officers, employees, non-employee directors, and other key persons (including consultants and advisory board members). All options and awards granted under the Plan consist of the Company’s shares of common stock. The Company’s policy is to issue stock available from its registered but unissued stock pool through its transfer agent to satisfy stock option exercises and the vesting of restricted stock units. The vesting period for awards is generally four years and the contractual life is ten years. Canceled and forfeited options and awards are available to be reissued under the Plan. In June 2020, the Company’s shareholders approved the Plan to, among other things, increase of the number of shares of the Company’s common stock available for issuance pursuant thereto by 3,000,000 shares, which increased the total shares authorized to be issued under the Plan to 5,098,000. There were 3,461,091 shares available for issuance as of March 31, 2021. The Company has granted options to purchase common stock under the Plan. Stock option activity during the three months ended March 31, 2021 was as follows:
The Company’s outstanding stock options include 338,663 performance-based awards that have vesting provisions subject to the achievement of certain business milestones. Total unrecognized compensation expense for the remaining 243,532 performance-based awards is approximately $0.8 million. No expense has been recognized for these unvested awards as of March 31, 2021 given that the milestone achievements for these awards have not yet been deemed probable for accounting purposes. Aggregate intrinsic value for outstanding options and exercisable options for the year ended March 31, 2021 was $0 based on the Company’s closing stock price of $1.34 per share as of March 31, 2021. As of March 31, 2021, unrecognized compensation cost related to unvested nonperformance-based awards amounted to $0.3 million, which will be recognized over a weighted average period of 0.3 years. The Company uses the Black-Scholes option pricing model to value its stock options. The weighted average assumptions for valuing options granted during the three months ended March 31, 2021 were as follows:
In February 2020, as part of the termination arrangement with the Company’s former chief executive officer, the Company modified certain options to purchase 236,970 shares of common stock, issued an 80,000 fully vested stock option grant, and accelerated the vesting of 3,300 restricted stock units resulting in recording $153,000, $70,000, and $4,000, respectively, of share-based compensation during the three months ended March 31, 2020. In March 2020, the Company issued 35,000 common stock awards to an employee that was earned upon the achievement of certain milestones. One of the milestones for 15,000 common shares was achieved on March 27, 2020, and the Company issued 9,795 fully vested share of common stock to the employee with 5,205 common shares withheld to cover taxes. During the three months ended March 31, 2020, the Company recognized a total of $74,800 of share-based compensation with the remaining expense of $65,200 recognized upon the achievement of certain milestones over the requisite service period during the three months ended June 30, 2020. The Company recorded share-based compensation expense in the following expense categories of its consolidated statements of operations:
The Company estimates the fair value of non-employee share options using the Black-Scholes option pricing model reflecting the same assumptions as applied to employee and director options in each of the reporting periods, other than the expected life, which is assumed to be the remaining contractual life of the options. |
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- Definition The entire disclosure for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Commitments and Contingencies |
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| Commitments and Contingencies | |
| Commitments and Contingencies | 7. Commitments and Contingencies On April 14, 2017, representatives for the estate of a deceased individual filed a civil lawsuit in the Suffolk Superior Court, in Boston, Massachusetts, against the Company and Harvard Bioscience. The complaint alleges that the decedent’s injury and death were caused by two tracheal implants that incorporated synthetic trachea scaffolds and a biologic component combined by the implanting surgeon with a bioreactor, and surgically implanted in the decedent in two surgeries performed in 2012 and 2013. The civil complaint seeks a non-specific sum of money to compensate the plaintiffs. This civil lawsuit relates to the Company’s first-generation trachea scaffold technology for which the Company discontinued development in 2014, and not to the Company’s current Cellspan technology nor to its lead development product candidate, the Cellspan Esophageal Implant. The Company intends to vigorously defend this case. While the Company believes that such claim lacks merit, the Company is unable to predict the ultimate outcome of such litigation. In accordance with a separation and distribution agreement between Harvard Bioscience and the Company relating to the spin-off, the Company would be required to indemnify Harvard Bioscience against losses that Harvard Bioscience may suffer as a result of this litigation. The Company has been informed by its insurance provider that the case has been accepted as an insurable claim under the Company’s product liability insurance policy. The Company does not believe a loss is probable at this time and therefore has not accrued any amounts for this contingent liability. From time to time, the Company may be involved in various claims and legal proceedings arising in the ordinary course of business. Other than the above matter, there are no such matters pending that the Company expects to be material in relation to its business, financial condition, results of operations, or cash flows. |
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- Definition The entire disclosure for commitments and contingencies. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Leases |
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| Leases | 8. Leases The Company leases laboratory and office space and certain equipment with remaining terms ranging approximately from 1 year to 3.5 years. The laboratory and office space arrangement is under a sublease that was renewed in December of 2020 and currently extends through May 31, 2022. This lease automatically renews annually for a one-year period unless the Company or the counterparty provides a notice of termination within one hundred and eighty days prior to May 31 of each year. All of the Company’s leases qualify as operating leases. The following table summarizes the presentation of the Company’s operating leases in its consolidated balance sheets:
Cash paid included in the computation of the right of use asset and lease liability during the three months ended March 31, 2021 and 2020 amounted to approximately $30,000, respectively. The weighted average remaining lease term and weighted average discount rate of the Company’s operating leases are as follows:
The Company recorded lease expense in the following expense categories of its consolidated statements of operations:
The minimum lease payments for the next five years are expected to be as follows:
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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Net Loss Per Share |
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| Net Loss Per Share | 9. Net Loss Per Share Basic and diluted loss per share is computed by dividing net loss attributable to common stockholders by the weighted-average common shares outstanding. The following potential common shares were excluded from the calculation of diluted net loss per share attributable to common stockholders for the three months ended March 31, 2021 and 2020 because including them would have had an anti-dilutive effect:
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- Definition The entire disclosure for earnings per share. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Income Taxes |
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| Income Taxes | 10. Income Taxes The Company did not record a federal or state income tax provision or benefit for the three months ended March 31, 2021 and 2020, respectively, due to the expected loss before income taxes to be incurred for the years ended December 31, 2021 and 2020, as well as the Company’s continued maintenance of a full valuation allowance against its net deferred tax assets. |
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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Subsequent Events |
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| Subsequent Events | 11. Subsequent Events Equity Transactions In May 2021, the Company received aggregate gross and net proceeds of approximately $0.3 million from a group of existing investors. |
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- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements (Policies) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements | ||||||||||||||||||||||||||||||||||||||||||||||||||
| SBIR Award | SBIR Award Grant income is recognized when qualified research and development costs are incurred and recorded in other income (expense), net in the consolidated statements of operations. When evaluating grant revenue from the SBIR grant, the Company considered accounting requirements under the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 606, Revenue From Contracts With Customers. The Company concluded that ASC 606 did not apply as there is no exchange of goods or services or an exchange of intellectual property between the parties; therefore, the Company presents grant income in other income. On March 28, 2018, the Company was awarded a Fast-Track Small Business Innovation Research (SBIR) grant by the Eunice Kennedy National Institute of Child Health and Human Development (NICHD) to support testing of pediatric Cellspan™ Esophageal Implants (CEIs). The award for Phase I provided for the reimbursement of approximately $0.2 million of qualified research and development costs which was received and recognized as grant income during 2018. On October 26, 2018, the Company was awarded the Phase II Fast-Track SBIR grant from the Eunice Kennedy NICHD grant aggregating $1.1 million to support development, testing, and translation to the clinic through September 2019 and represented years one and two of the Phase II portion of the award. On August 3, 2020, the Company was awarded a third year of the Phase II grant totaling $0.5 million for support of development, testing, and translation to the clinic covering qualified expenses incurred from October 1, 2019 through September 30, 2020. In September of 2020, the Company filed and was granted a one year, no-cost extension for the Phase II grant period extending through September 30, 2021. For the three months ended March 31, 2021, the Company recognized $0.1 million of grant income, from Phase II of the SBIR grant. The aggregate SBIR grant to date provides a total award of $1.8 million, of which, approximately $1.4 million has been recognized through March 31, 2021. The Company did not recognize any grant income during the three months ended March 31, 2020. |
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| Restricted Cash | Restricted Cash Restricted cash consists of $50,000 held as collateral for the Company’s credit card program as of March 31, 2021 and December 31, 2020. The Company’s statements of cash flows include restricted cash with cash when reconciling the beginning-of-period and end-of-period total amounts shown on such statements. A reconciliation of the cash and restricted cash reported within the balance sheet that sum to the total of the same amounts shown in the statements of cash flows is as follows:
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| Recently Adopted Accounting Pronouncements | Recently Adopted Accounting Pronouncements Accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s financial statements upon adoption. |
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| X | ||||||||||
- Definition Disclosure of accounting policy pertaining to newly adopted accounting pronouncements. No definition available.
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| X | ||||||||||
- Definition Small Business Innovation Research (SBIR) grant by the Human Development to support testing of pediatric Cellspan Esophageal Implants. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of reconciliation of the cash and restricted cash reported within the balance sheet that sum to the total of the same amounts shown in the consolidated statements of cash flows |
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| X | ||||||||||
- Definition Tabular disclosure for reconciliation of the cash and restricted cash reported within the balance sheet that sum to the total of the same amounts shown in the statements of cash flows. No definition available.
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| X | ||||||||||
- References No definition available.
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Capital Stock (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | ||||||||||||||||||||||||||||||||||||
| Capital Stock | ||||||||||||||||||||||||||||||||||||
| Schedule of Classification of warrants to equity |
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| X | ||||||||||
- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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Fair Value Measurements (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of reconciliation company's liabilities at fair value on recurring basis |
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| Schedule of weighted average assumptions |
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| X | ||||||||||
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Share-Based Compensation (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Compensation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Stock option and restricted stock unit activity | The Company has granted options to purchase common stock under the Plan. Stock option activity during the three months ended March 31, 2021 was as follows:
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| Schedule of weighted average assumptions | The Company uses the Black-Scholes option pricing model to value its stock options. The weighted average assumptions for valuing options granted during the three months ended March 31, 2021 were as follows:
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| Schedule of share-based compensation expense | The Company recorded share-based compensation expense in the following expense categories of its consolidated statements of operations:
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| X | ||||||||||
- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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Leases (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of presentation of operating leases in consolidated balance sheets | The following table summarizes the presentation of the Company’s operating leases in its consolidated balance sheets:
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| Schedule of Weighted average discount rate and lease term | The weighted average remaining lease term and weighted average discount rate of the Company’s operating leases are as follows:
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| Summary of lease expense categories in consolidated statements of operations | The Company recorded lease expense in the following expense categories of its consolidated statements of operations:
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| Summary of minimum lease payments for the next five years and thereafter | The minimum lease payments for the next five years are expected to be as follows:
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| X | ||||||||||
- Definition Table depicting details of the lessees right to asset utilization under operating lease corresponding to The relevant liability undiscounted No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of discount rate and remaining lease term of operating and financial leases. No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Net Loss Per Share (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||
| Net Loss Per Share | |||||||||||||||||||||||||||||||||||||||||
| Schedule of antidilutive securities excluded from computation of earnings per share |
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Overview and Basis of Presentation (Details) - USD ($) $ in Thousands |
1 Months Ended | |||
|---|---|---|---|---|
May 31, 2021 |
Oct. 31, 2013 |
Mar. 31, 2021 |
Dec. 31, 2020 |
|
| Overview And Basis Of Presentation [Line Items] | ||||
| Retained Earnings (Accumulated Deficit) | $ (69,834) | $ (68,960) | ||
| Cash | $ 466 | |||
| Harvard Bioscience Plan [Member] | ||||
| Overview And Basis Of Presentation [Line Items] | ||||
| Proceeds from Contributions from Parent | $ 15,000 | |||
| Subsequent Event [Member] | Existing Investors | ||||
| Overview And Basis Of Presentation [Line Items] | ||||
| Cash proceeds received | $ 300 | |||
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The cash inflow from parent as a source of financing that is recorded as additional paid in capital. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements - Additional Information (Details) - USD ($) |
1 Months Ended | 3 Months Ended | |||
|---|---|---|---|---|---|
Oct. 26, 2018 |
Mar. 28, 2018 |
Mar. 31, 2021 |
Dec. 31, 2020 |
Aug. 03, 2020 |
|
| Basic And Diluted Earnings Per Share [Line Items] | |||||
| Recognized grants receivable | $ 1,400,000 | ||||
| Restricted Cash | $ 50,000 | $ 50,000 | |||
| Maximum Research And Development Expenses Reimbursement | $ 200,000 | ||||
| Grants Receivable | 1,800,000 | ||||
| Phase Two [Member] | |||||
| Basic And Diluted Earnings Per Share [Line Items] | |||||
| Grants Receivable in fiscal year | $ 1,100,000 | $ 500,000 | |||
| Grant Income Recognized | $ 100,000 |
| X | ||||||||||
- Definition The amount of grant income recognized. No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow for recognized grants. No definition available.
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| X | ||||||||||
- Definition It represents the maximum research and development expenses reimbursement. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements - Cash and restricted cash (Details) - USD ($) $ in Thousands |
Mar. 31, 2021 |
Dec. 31, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|---|---|
| Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements | ||||
| Cash | $ 466 | |||
| Restricted cash | 50 | $ 50 | ||
| Total cash and restricted cash as shown in the consolidated statements of cash flows | $ 516 | $ 856 | $ 963 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
Notes Payable (Details) - Paycheck Protection Program loan [Member] - USD ($) $ in Millions |
Dec. 18, 2020 |
May 04, 2020 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Proceeds from Issuance of Debt | $ 0.4 | $ 0.4 |
| Fixed interest rate | 1.00% |
| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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Capital Stock (Details) |
3 Months Ended |
|---|---|
|
Mar. 31, 2020
$ / shares
| |
| Capital Stock | |
| Risk-free interest rate | 0.88% |
| Expected volatility | 106.70% |
| Expected term (in months) | 2 months |
| Expected dividend yield | 0.00% |
| Exercise price | $ 3.70 |
| Market value of common stock | $ 3.11 |
| X | ||||||||||
- Definition The value represents market value of common stock. No definition available.
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| X | ||||||||||
- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. No definition available.
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| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Shares issued Pursuant to Exercise of Warrants By the Holders Of The Warrants No definition available.
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| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
|
| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
Fair Value Measurements - Reconciliation of company liabilities (Details) $ in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2021
USD ($)
| |
| Fair Value Measurements | |
| Beginning Balance | $ 17 |
| Change in fair value upon re-measurement | (3) |
| Ending Balance | $ 14 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Fair Value Measurements (Details) - USD ($) $ in Thousands |
Mar. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Liabilities: | ||
| Liabilities classified | $ 14 | $ 17 |
| Level 2 [Member] | ||
| Assets: | ||
| Assets classified | 0 | 0 |
| Liabilities: | ||
| Liabilities classified | $ 0 | $ 0 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|
Fair Value Measurements - Weighted average assumptions (Details) - $ / shares |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2021 |
Dec. 31, 2020 |
|
| Exercise Price | $ 8.00 | $ 8.00 |
| Market value of common stock | $ 1.34 | $ 1.25 |
| Warrants to purchase shares of common stock | 92,212 | 92,212 |
| Measurement Input, Risk Free Interest Rate [Member] | ||
| Risk-free interest rate | 0.16% | 0.12% |
| Measurement Input, Price Volatility [Member] | ||
| Expected volatility | 140.08 | 137.89 |
| Measurement Input, Expected Term [Member] | ||
| Expected term (in years) | 10 months 24 days | 1 year 1 month 6 days |
| Measurement Input, Expected Dividend Rate [Member] | ||
| Expected dividend yield | 0.00% | 0.00% |
| X | ||||||||||
- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). No definition available.
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| X | ||||||||||
- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. No definition available.
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| X | ||||||||||
- Definition Risk-free interest rates assumption used in valuing an instrument. No definition available.
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| X | ||||||||||
- Definition The estimated fair value of market value common stock relating to market liability. No definition available.
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| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Share-Based Compensation - Stock option and restricted stock unit activity (Details) - Biostage2013 Equity Incentive Plan [Member] - Stock Options [Member] shares in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2021
$ / shares
shares
| |
| Amount, Outstanding | shares | 1,599,720 |
| Amount, Granted | shares | 16,413 |
| Amount, Outstanding | shares | 1,616,134 |
| Weighted-average exercise price, Outstanding | $ / shares | $ 6.33 |
| Weighted-average exercise price, Granted | $ / shares | 1.80 |
| Weighted-average exercise price, Outstanding | $ / shares | $ 6.31 |
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Share-Based Compensation - Weighted average assumptions (Details) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk-free interest rate | 0.88% | |
| Expected volatility | 106.70% | |
| Expected term (in years) | 2 months | |
| Expected dividend yield | 0.00% | |
| Biostage2013 Equity Incentive Plan [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk-free interest rate | 0.47% | |
| Expected volatility | 123.20% | |
| Expected term (in years) | 5 years 3 months 18 days | |
| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
Share-Based Compensation - Share-based compensation expenses (Details) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | |
|---|---|---|---|
Feb. 29, 2020 |
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Total share-based compensation | $ 70,000 | $ 130 | $ 588 |
| Research and development [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Total share-based compensation | 80 | 92 | |
| Selling, general and administrative [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Total share-based compensation | $ 50 | $ 496 | |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Definition Number of common shares whose milestone were achieved by the company. No definition available.
|
| X | ||||||||||
- Definition Number of stock options modified under share-based payment arrangement during the period. No definition available.
|
| X | ||||||||||
- Definition Amount of share based compensation arrangement by share based payment award unrecognized compensation costs. No definition available.
|
| X | ||||||||||
- Definition Number of shares or units withheld to cover taxes, under share-based payment arrangement. No definition available.
|
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. No definition available.
|
| X | ||||||||||
- Definition Number of shares authorized for issuance under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
|
| X | ||||||||||
- Definition Number of shares for which recognition of cost was accelerated for award under share-based payment arrangement. No definition available.
|
| X | ||||||||||
- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Leases (Details) |
3 Months Ended |
|---|---|
Mar. 31, 2021 | |
| Lessee, Lease, Description [Line Items] | |
| Renewal term | 1 year |
| Termination option | false |
| Notice period for termination | 180 days |
| Minimum [Member] | |
| Lessee, Lease, Description [Line Items] | |
| Remaining term | 1 year |
| Maximum [Member] | |
| Lessee, Lease, Description [Line Items] | |
| Remaining term | 3 years 6 months |
| X | ||||||||||
- Definition Notice period for termination of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Remaining term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Indicates (true false) whether lessee has option to terminate operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Leases - Operating leases in consolidated balance sheets (Details) - USD ($) $ in Thousands |
Mar. 31, 2021 |
Dec. 31, 2020 |
Mar. 31, 2020 |
|---|---|---|---|
| Leases | |||
| Operating lease assets | $ 156 | $ 182 | $ 166 |
| Right-of-use asset | Operating lease assets | ||
| Current portion of operating lease liabilities | $ 110 | 107 | 105 |
| Current portion of operating lease liabilities | Current portion of operating lease liabilities | ||
| Non-current Operating lease liabilities | $ 46 | $ 75 | 61 |
| Operating lease liabilities, net of current portion | Non-current Operating lease liabilities | ||
| Present value of operating lease liabilities | $ 156 | $ 166 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Indicates line item in statement of financial position that includes current operating lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Indicates line item in statement of financial position that includes noncurrent operating lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Indicates line item in statement of financial position that includes operating lease right-of-use asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
Leases - Weighted average discount rate and lease term (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| Leases | ||
| Cash paid included in the computation of the right of use asset and lease liability | $ 30,000 | |
| Weighted average remaining lease term (in years) | 0 years | 2 years 2 months 12 days |
| Weighted average discount rate | 0.00% | 13.13% |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
Leases - Operating lease expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| Research and development | $ 473 | $ 643 |
| Selling, general and administrative | 522 | 1,253 |
| Assets Leased To Other [Member] | ||
| Research and development | 19 | 19 |
| Selling, general and administrative | 11 | 11 |
| Operating lease expense | $ 30 | $ 30 |
| X | ||||||||||
- Definition Amount of operating lease expense. Excludes sublease income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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Leases - Minimum lease payments (Details) - USD ($) $ in Thousands |
Mar. 31, 2021 |
Mar. 31, 2020 |
|---|---|---|
| Minimum lease payments for the next five years and thereafter | ||
| 2020 | $ 91 | |
| 2021 | 62 | |
| 2022 | 12 | |
| 2023 | 7 | |
| Total lease payments | 172 | |
| Less: imputed interest | 16 | |
| Present value of operating lease liabilities | $ 156 | $ 166 |
| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in previous fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). No definition available.
|
| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
Net loss Per Share - Anti-dilutive shares (Details) - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 3,509,335 | 4,237,648 |
| Warrants [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,893,201 | 2,610,078 |
| Stock Options [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,616,134 | 1,607,570 |
| Common Stock [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 0 | 20,000 |
| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | ||
|---|---|---|---|
May 31, 2021 |
Mar. 31, 2021 |
Dec. 31, 2020 |
|
| Subsequent Event [Line Items] | |||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 8.00 | $ 8.00 | |
| Subsequent Event [Member] | Existing Investors | |||
| Subsequent Event [Line Items] | |||
| Gross and net proceeds from issuance | $ 0.3 |
| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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