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Note 5 - Fair Value Measurements - Derivative Liability Measured at Fair value (Details) - Derivative Financial Instruments, Liabilities [Member] - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Balance $ 1,270 $ 1,200
Change in fair value 4,922 70
Settlement of contingent consideration (3,092)  
Balance $ 3,100 $ 1,270