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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Taxes |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of the statutory U.S. federal rate to the Company’s effective tax rate is as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, |
​ |  | 2023 |  | 2022 |
Statutory federal income tax rate |  | 21 | % | 21 | %
State taxes, net of federal tax benefit |  | 16 | % | 16 | %
Non-deductible items |  | — | % | (1) | %
Tax credits |  | 4 | % | 5 | %
Other |  | (3) | % | 1 | %
Change in valuation allowance |  | (38) | % | (42) | %
Income taxes provision (benefit) |  | — |  | — | ​
Schedule of Deferred Tax Assets | The components of the net deferred tax asset as of December 31, 2023 and 2022 are the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31,
($ in thousands) |  | 2023 |  | 2022
Deferred tax assets: |  | ​ |  |  | ​ |
Net operating loss carryovers | ​ | $ | 84,651 | ​ | $ | 75,011
Stock compensation and other | ​ |  | 1,946 | ​ |  | 2,399
Change in fair value of warrant liabilities | ​ |  | 59 | ​ |  | 59
Amortization of license | ​ |  | 11,856 | ​ |  | 13,375
Lease liability | ​ | ​ | 929 | ​ | ​ | 1,466
Accruals and reserves | ​ |  | 1,841 | ​ |  | 1,434
Startup costs | ​ |  | 5 | ​ |  | 6
Tax credits | ​ | ​ | 18,189 | ​ | ​ | 15,649
174 Capitalization | ​ |  | 28,800 | ​ |  | 19,787
Total deferred tax assets | ​ | ​ | 148,276 | ​ | ​ | 129,186
Less: valuation allowance | ​ |  | (147,694) | ​ |  | (128,101)
Net deferred tax assets | ​ | $ | 582 | ​ | $ | 1,085
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax liabilities: | ​ | ​ | ​ | ​ | ​ | ​
Right of use asset | ​ | ​ | (582) | ​ | ​ | (1,085)
Total deferred tax assets, net | ​ | $ | — | ​ | $ | —

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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