Note A - Basis of Presentation and Summary of Significant Accounting Policies - Contract Liabilities and Revenue Recognized (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Contract Liabilities (Customer Deposits), balance	$ 140	$ 1,721
Contract Liabilities (Customer Deposits), addition	326	372
Contract Liabilities (Customer Deposits), revenue recognized	(137)	(1,721)
Contract Liabilities (Customer Deposits)	(3)	0
Contract Liabilities (Customer Deposits), balance	$ 326	$ 372