Note A - Significant Accounting Policies - Restatement (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Property, plant and equipment, net	$ 45,463	$ 58,284
Right-of-use assets operating leases	14,736	14,448
Operating lease liabilities	12,887	12,738
Other long-term liabilities	$ 7,000	3,362
Previously Reported [Member]
Property, plant and equipment, net		72,732
Right-of-use assets operating leases		0
Operating lease liabilities		13,495
Other long-term liabilities		2,605
Revision of Prior Period, Error Correction, Adjustment [Member]
Property, plant and equipment, net		(14,448)
Right-of-use assets operating leases		14,448
Operating lease liabilities		(757)
Other long-term liabilities		$ 757