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Note 13 - Contingent Consideration (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ (2,430) $ 0 $ (2,330) $ 0