Note A - Basis of Presentation and Summary of Significant Accounting Policies - Contract Liabilities and Revenue Recognized (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Contract Liabilities (Customer Deposits), balance	$ 317	$ 140
Contract Liabilities (Customer Deposits), addition	413	108
Contract Liabilities (Customer Deposits), revenue recognized	(325)	(140)
Contract Liabilities (Customer Deposits)	0	0
Contract Liabilities (Customer Deposits), balance	$ 405	$ 108