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Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Research and development tax credit carryforwards $ 33,764,000 $ 36,041,000
Net operating loss carryforwards 22,000 5,985,000
Stock-based compensation 3,940,000 2,341,000
Inventory reserves 2,303,000 2,268,000
Investment tax credit carryforwards 2,461,000 1,928,000
UNICAP 1,118,000 1,363,000
Vacation accrual 1,248,000 1,338,000
Lease liabilities 1,422,000 787,000
Accrued payroll tax deferral 0 384,000
Capitalized research and development 12,142,000 0
Other 2,871,000 1,568,000
Total deferred tax assets 61,291,000 54,003,000
Less: Valuation allowance for deferred tax assets (47,413,000) (43,329,000)
Net deferred tax assets 13,878,000 10,674,000
Deferred tax liabilities:    
Depreciation (11,396,000) (9,048,000)
Prepaid expenses (751,000) (662,000)
ROU assets (1,362,000) (756,000)
Other (89,000) 0
Total deferred tax liabilities (13,598,000) (10,466,000)
Net deferred tax assets (liabilities) $ 280,000 $ 208,000