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Note O - Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
NOL carryforward $ 44,448 $ 31,526    
Inventory reserves 2,872 2,241    
Unrealized gains and losses 69 59    
Share-based compensation 645 618    
Foreign tax credit 4,599 4,599    
Research and development credits 9,879 9,008    
Interest 2,840 1,784    
ASC 842 Assets 1,740 1,671    
Other 728 784    
Deferred tax assets 67,820 52,290    
Less valuation allowance (57,721) (43,462) $ (25,736) $ 0
Deferred tax assets, net 10,099 8,828    
Depreciation and amortization (8,600) (7,402)    
ASC 842 Liabilities (1,499) (1,426)    
Deferred tax liabilities (10,099) (8,828)    
Deferred tax assets (liabilities), net $ 0 $ 0