Note E - Leases - Lease Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of operating lease liabilities	$ 826	$ 791	$ 1,646	$ 1,566
Operating lease liabilities arising from obtaining Right of Use Assets for new leases
Operating lease liabilities arising from recording Right of Use Assets upon adoption of ASC 842		$ 20,897		$ 20,897