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Note B - Business Combinations (Details Textual) - Plateplus Inc. [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 30, 2022	Sep. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Combination, Consideration Transferred, Total	$ 76,500
Payments to Acquire Businesses, Gross	$ 71,700
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable			$ 4,784		$ 4,800
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	516,041				516,041
Goodwill, Ending Balance	$ 0
Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs		$ 500		$ 1,200
ABL Facility [Member] \| JPMorgan Chase Bank N.A. [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	$ 71,900