Note E - Leases - Lease Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of operating lease liabilities	$ 821	$ 786	$ 2,467	$ 2,352
Operating lease liabilities arising from obtaining Right of Use Assets for new leases	187		187
Operating lease liabilities arising from recording Right of Use Assets upon adoption of ASC 842		$ 20,897		$ 20,897