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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Summary of Significant Accounting Policies |
Schedule of reconciliation of cash, cash equivalents and restricted cash | The reconciliation of cash, cash equivalents and restricted cash reported within the applicable balance sheet that sum to the total of the same such amount shown in the statement of cash flows is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2021 |  | 2020
Cash and cash equivalents | ​ | $ | 86,508 | ​ | $ | 24,930
Restricted cash (1) | ​ |  | 121 | ​ |  | 121
Total | ​ | $ | 86,629 | ​ | $ | 25,051
| (1) | Included in prepaid expenses and other current assets at December 31, 2021 and other long-term assets at December 31, 2020.
Schedule of stock-based compensation expense | During the years ended December 31, 2021 and 2020, the Company recorded stock-based compensation expense for employee and non-employee stock options and restricted stock, which was allocated as follows in the statements of operations (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2020
Research and development | ​ | $ | 1,132 | ​ | $ | 599
General and administrative | ​ |  | 2,230 | ​ |  | 791
Total | ​ | $ | 3,362 | ​ | $ | 1,390
​
Schedule of anti-dilutive common stock equivalents excluded from calculation of diluted net loss per share | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2020
Stock options |  | 1,346,733 |  | 227,945
Common stock warrants |  | 1,530,380 |  | 1,032,292
Series X Preferred Stock (1) | ​ | 5,242,501 | ​ | —
​ |  | 8,119,614 |  | 1,260,236

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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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