XML 100 R84.htm IDEA: XBRL DOCUMENT v3.20.4
Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Research and development tax credit carryforwards $ 29,046,000 $ 27,607,000
Net operating loss carryforwards 5,923,000 328,000
Inventory reserves 2,282,000 1,522,000
Investment tax credit carryforwards 1,927,000 2,102,000
Stock-based compensation 1,796,000 1,587,000
Vacation accrual 1,349,000 1,280,000
UNICAP 1,336,000 351,000
Accrued payroll tax deferral 764,000  
Lease liabilities 518,000 679,000
Other 1,197,000 1,708,000
Total deferred tax assets 46,138,000 37,164,000
Less: Valuation allowance for deferred tax assets (37,856,000) (30,363,000)
Net deferred tax assets 8,282,000 6,801,000
Deferred tax liabilities:    
Depreciation (6,809,000) (5,296,000)
Prepaid expenses (616,000) (552,000)
ROU assets (490,000) (653,000)
Other (141,000) (95,000)
Total deferred tax liabilities (8,056,000) (6,596,000)
Net deferred tax assets (liabilities) $ 226,000 $ 205,000