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, 2024	Mar. 31, 2023
Contract Liabilities (Customer Deposits), balance	$ 317	$ 140
Contract Liabilities (Customer Deposits), addition	1,406	326
Contract Liabilities (Customer Deposits), revenue recognized	(1,336)	137
Contract Liabilities (Customer Deposits)	0	(3)
Contract Liabilities (Customer Deposits), balance	387	326
Contract Liabilities (Customer Deposits), revenue recognized	$ 1,336	$ (137)