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Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets:    
Net operating loss carryforwards $ 31,342 $ 24,092
Research and development tax credit carryforwards 9,327 4,218
Accrued liabilities 2,828 2,781
Stock-based compensation 2,564 1,676
Operating lease liability 333 404
Other 180 121
Capitalized research and development 25,182 10,729
Total deferred tax assets 71,756 44,021
Deferred tax liabilities:    
Right of use asset (221) (267)
Prepaid expenses and other (75) (475)
Investments (214) (294)
Total deferred tax liabilities (510) (1,036)
Less valuation allowance (71,246) (42,985)
Net deferred tax assets $ 0 $ 0