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Note 12 - Income Taxes - Provisions for Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Current tax provision      
U.S. Federal $ (83) $ 1,500 $ 2,348
U.S. State 286 628 814
Foreign 1,372 404 993
Total current tax expense 1,575 2,532 4,155
Deferred tax provision:      
U.S. Federal 1,707 (2,410) 60
U.S. State 337 (619) 599
Foreign (1,916) (474) (2,730)
Total deferred tax expense 128 (3,503) (2,071)
Total income tax expense (benefit) $ 1,703 $ (971) $ 2,084