Note D - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	$ 700		$ 700	$ 800
Operating Lease, Right-of-Use Asset	18,300		18,300	21,400
Finance Lease, Right-of-Use Asset, Accumulated Depreciation		$ 800		$ 700
Asset Impairment Charges, Total	0		0
Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year	600		600
Lessor, Operating Lease, Payment to be Received, Year One	$ 200		$ 200
Minimum [Member]
Lessee, Lease Remaining Lease Term (Year)			1 year
Maximum [Member]
Lessee, Lease Remaining Lease Term (Year)			9 years
Lessee, Lease, Renewal Term (Year)		5 years