Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details)

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Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Gross deferred tax assets:      
Net operating loss carryforward $ 20,702 $ 12,684  
Tax credits 199 92  
Accruals and reserves 2,333 2,113  
Property and equipment 102 83  
Alternative minimum tax credits 21 21  
Total gross deferred tax assets 23,357 14,993  
Less: valuation allowance (22,738) (14,281) $ (11,814)
Total deferred tax assets net of valuation allowance 619 712  
Deferred tax liabilities:      
Accrual and reserves (550) (678)  
Net deferred tax assets (liabilities) $ 69 $ 34