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Note 6 - Goodwill and Intangible Assets - Amortization Expense for Finite-lived Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Amortization of Intangible Assets $ 28,821 $ 21,806 $ 14,513
Cost of Sales [Member]      
Amortization of Intangible Assets 6,796 3,806 1,430
General and Administrative Expense [Member]      
Amortization of Intangible Assets $ 22,025 $ 18,000 $ 13,083