Note H - Employee Benefit Plans - Summary of Changes in Plan Assets and Benefit Obligation (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net gain	$ 189	$ 481
Settlement loss	(50)
Amortization of net loss	(37)	(57)
Plan expenses	39		$ 39
Total recognized in other comprehensive income (loss)	141	424
Total recognized in net periodic benefit cost and other comprehensive income	$ 194	$ 451