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Note 7 - Supplemental Balance Sheets Information (Tables)

12 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Employee Related Liabilities [Table Text Block]

		March 31, 2022				March 31, 2021
Bonus payable		$	7,468			$	3,504
Wages and paid-time-off payable			3,677				3,562
Payroll related taxes			2,069				2,043
Other benefits payable			1,503				279
Total accrued payroll and benefits		$	14,717			$	9,388

Schedule of Accrued Liabilities [Table Text Block]

		March 31, 2022				March 31, 2021
Accrued business taxes		$	4,967			$	4,749
Current operating lease liabilities			2,768				1,023
Customer deposits			751				514
Income taxes payable			928				1,648
Other			2,197				2,011
Total other accrued expenses		$	11,611			$	9,945

Property, Plant and Equipment [Table Text Block]

		March 31, 2022				March 31, 2021
Land		$	889			$	889
Buildings			21,537				18,857
Manufacturing equipment			17,336				12,163
Computer equipment			4,519				4,350
Construction in progress			487				985
Other			1,578				1,084
Gross total			46,346				38,328
Accumulated depreciation			(17,726	)			(16,330	)
Property, plant and equipment, net		$	28,620			$	21,998

Schedule of Inventory, Current [Table Text Block]

		March 31, 2022				March 31, 2021
Raw materials		$	14,172			$	5,755
Work in process			4,419				426
Finished goods			6,015				4,997
Inventories, net		$	24,606			$	11,178

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