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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Taxes |
Schedule of components of income taxes | For the years ended December 31, 2023 and 2022, the Company’s provision for income tax consisted of (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2023 |  | 2022
Current: | ​ | ​ | ​ | ​ | ​ | ​
Federal | ​ | $ | — | ​ | $ | —
State | ​ | ​ | 134 | ​ | ​ | 14
Foreign | ​ | ​ | — | ​ | ​ | —
Total Current | ​ | $ | 134 | ​ | $ | 14
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred: | ​ | ​ | ​ | ​ | ​ | ​
Federal | ​ | $ | 40 | ​ | $ | —
State | ​ | ​ | (190) | ​ | ​ | —
Foreign | ​ | ​ | — | ​ | ​ | —
Total Deferred | ​ | $ | (150) | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​
Provision for income taxes | ​ | $ | (16) | ​ | $ | 14
Schedule of reconciliation of statutory federal income tax rate | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, | ​
​ |  | 2023 |  | 2022 |
Tax at statutory federal rate | ​ | 21.0 | % | 21.0 | %
State taxes, net of federal benefit | ​ | 1.7 | ​ | 1.9 | ​
Stock-based compensation | ​ | 0.6 | ​ | 4.2 | ​
IRC section 162(m) limitation | ​ | 3.9 | ​ | 1.1 | ​
Change in valuation allowance | ​ | (28.5) | ​ | (28.0) | ​
Other | ​ | 1.1 | ​ | — | ​
Provision for income taxes | ​ | (0.2) | % | 0.2 | %
Schedule of tax effects of temporary differences and carryforwards | The tax effects of temporary differences and carryforwards that give rise to significant portions of the deferred tax assets are as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2023 |  | 2022
Deferred tax assets: | ​ | ​ | ​ | ​ | ​ | ​
Net operating loss carryforwards | ​ | $ | 22,068 | ​ | $ | 27,110
Inventory | ​ | ​ | 287 | ​ | ​ | 273
Accruals | ​ | ​ | 863 | ​ | ​ | 737
Depreciation and amortization | ​ | ​ | 13 | ​ | ​ | 27
Research and experimental expenditures | ​ | ​ | 4,728 | ​ | ​ | 2,229
Stock-based compensation | ​ | ​ | 268 | ​ | ​ | 270
Right of use liability | ​ | ​ | 1,245 | ​ | ​ | 1,477
Gross deferred tax assets | ​ | ​ | 29,472 | ​ | ​ | 32,123
Valuation allowance | ​ | ​ | (27,748) | ​ | ​ | (30,328)
Deferred tax assets | ​ | ​ | 1,724 | ​ | ​ | 1,795
Deferred tax liabilities: | ​ | ​ | ​ | ​ | ​ | ​
Right of use asset | ​ | ​ | (1,226) | ​ | ​ | (1,463)
Other | ​ | ​ | (348) | ​ | ​ | (332)
Deferred tax liabilities | ​ | ​ | (1,574) | ​ | ​ | (1,795)
Net deferred tax assets | ​ | $ | 150 | ​ | $ | —
Schedule of changes in the Company's gross unrecognized tax benefits | A summary of changes in the Company’s gross unrecognized tax benefits for the years ended December 31, 2023 and 2022 was as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2023 |  | 2022
Unrecognized tax expense, beginning of the year | ​ | $ | 105 | ​ | $ | 105
Decrease related to prior year tax positions | ​ | ​ | — | ​ | ​ | (16)
Increase related to prior year tax positions | ​ | ​ | 368 | ​ | ​ | —
Increase related to current year tax positions | ​ | ​ | — | ​ | ​ | 16
Unrecognized tax expense, end of year | ​ | $ | 473 | ​ | $ | 105

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 9 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-9 + Details
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