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Note 12 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Income Tax Expense (Benefit), Total $ (1,546) $ 112 $ (1,166) $ 29
Deferred Tax Liabilities, Acquisition 1,700   1,700  
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 1,700   1,700  
Liability for Uncertainty in Income Taxes, Current 0   0  
Unrecognized Tax Benefits, Ending Balance $ 0   $ 0  
Maximum [Member]        
Income Tax Expense (Benefit), Total       $ 100