Note H - Employee Benefit Plans - Components Included in Defined Benefit Pension Plan's Net Periodic Benefit Expense (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest cost	$ 57	$ 46	$ 57
Expected return on plan assets	(85)	(69)
Recognized actuarial loss	38	50
Settlement loss	43
Net periodic benefit expense	$ 53	$ 27