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Income Taxes - Schedule of deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax asset:    
Net operating loss carryforwards $ 20,460 $ 9,891
Accrued expenses and other 3,520 1,345
Stock compensation 779 182
Credit carryforwards 6,194 3,708
Deferred revenue 0 2,631
Capital loss carryforwards 484 27
Gross deferred tax asset 31,437 17,784
Less valuation allowance (30,331) (17,285)
Net deferred tax asset 1,106 499
Deferred tax liability:    
Depreciation and amortization (578) (121)
Prepaid expenses (528) (378)
Total deferred tax liability (1,106) (499)
Total net deferred tax asset $ 0 $ 0