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Income Taxes - Schedule of Principal Components of Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Abstract]    
Stock-based compensation $ 663 $ 554
Research and development credits 6,623 6,817
Capitalized research expense 3,094 1,557
Net operating loss 1,768 2,562
Loss on note receivable 644  
Other 257 335
Total deferred tax assts 13,049 11,825
Valuation allowance (12,504) (11,115)
Depreciation (138) (193)
Intangibles (407) (517)
Total deferred tax liabilities $ (545) $ (710)