Note H - Lease Obligations - Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Operating lease right-of-use assets	$ 14,736	$ 14,448
Finance lease right-of-use assets	5,244	959
Operating lease liabilities	12,887	12,738
Property, Plant and Equipment, Net [Member]
Operating lease right-of-use assets	14,736	14,448
Finance lease right-of-use assets	5,244	959
Accrued Liabilities [Member]
Operating lease liabilities	1,870	1,724
Finance lease liabilities	541	233
Lease Obligation [Member]
Operating lease liabilities	12,887	12,738
Finance lease liabilities	$ 4,836	$ 757