Note D - Leases (Details Textual) - USD ($)	Jun. 30, 2020	Jul. 01, 2019	Jun. 30, 2019
Operating Lease, Right-of-Use Asset	$ 18,354,000	$ 20,774,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	7 years 73 days
Operating Lease, Weighted Average Discount Rate, Percent	3.24%
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset		20,774,000
Operating Lease, Liability, Total		$ 20,900,000