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Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	87.00%	79.00%	80.00%	76.00%
Contract With Customer Loss Accrual	$ 1,600		$ 3,200
Minimum [Member]
Warranty Period (Year)			1 year
Contract with Customer, Payment Term (Day)			30 days
Maximum [Member]
Warranty Period (Year)			3 years
Extended Service Warranty, Term (Year)			4 years
Contract with Customer, Payment Term (Day)			60 days
Grant [Member]
Revenues, Total		$ 100	$ 0	$ 900

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The increase in loss accrual costs from contract with customer.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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