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Note 13 - Income Taxes - Schedule of Income Tax Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Tax computed at the federal statutory rate $ 96 $ (6,045) $ (12,540)
State taxes 485 (1,072) (2,304)
Foreign taxes 92 247 83
Permanent items 6,864 22,689 13,660
R&D credits (1,490) (3,941) (5,231)
Prior year adjustment (455) 916 (2,116)
Change in valuation allowance (5,137) (12,470) 8,655
Total provision $ 455 $ 324 $ 207