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Income Taxes - Significant Components of Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Net operating losses $ 36,144 $ 31,110
Research and development credits 9,220 5,268
Stock options 1,604 833
Accrued expenses 758 490
Amortization 3,899 4,194
Lease liability 688 875
Capitalized R&E expenditures 10,467 0
Other 297 96
Gross deferred tax assets 63,077 42,866
Less: Valuation allowance (62,468) (42,056)
Net deferred tax assets 609 810
Deferred tax liabilities:    
Depreciation of fixed assets (184) (277)
Right of use assets (422) (533)
Others (3) 0
Gross deferred tax liabilities (609) (810)
Non-current net deferred tax assets (liabilities) $ 0 $ 0