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Income Taxes - Temporary Differences (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Income Tax Disclosure [Abstract] |  |
Accrued expenses and other reserves | $ 1,195 | $ 1,458
Right-of-use-asset | (197) | (294)
Lease liabilities | 224 | 306
Tax credits, deferred R&D, and other | 470 | 438
Net operating loss | 20,935 | 18,856
Valuation allowance | (22,627) | (20,764)
Net deferred tax assets | $ 0 | $ 0

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from in-process research and development costs expensed in connection with a business combination. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-8 + Details
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