Note A - Basis of Presentation and Summary of Significant Accounting Policies - Contract Liabilities and Revenue Recognized (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Contract Liabilities (Customer Deposits), balance	$ 317	$ 140
Contract Liabilities (Customer Deposits), addition	975	425
Contract Liabilities (Customer Deposits), revenue recognized	(597)	137
Contract Liabilities (Customer Deposits)	0	(3)
Contract Liabilities (Customer Deposits), balance	695	425
Contract Liabilities (Customer Deposits), revenue recognized	$ 597	$ (137)