Note I - Income Taxes - Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred compensation and retirement plan	$ 13,135	$ 16,541
Accrued expenses not deductible until paid	181	237
Lease liability	5,873	6,346
Employee stock-based compensation	385	440
Accrued payroll not deductible until paid	96	108
Accounts receivable, net	59	53
Investment in foreign subsidiaries, outside basis difference	1,019	1,124
Goodwill	473	581
Interest Expense limitations	1,267	1,530
Other, net	452	440
Foreign net operating loss carryforwards	1,631	1,771
State net operating loss carryforwards	3,475	4,763
Foreign tax credit carryforwards	3,841	3,653
Federal net operating loss carryforwards	0	0
Research & Development Tax Credit Carryforward	215	0
Total gross deferred tax assets	32,102	37,587
Less valuation allowances	(25,894)	(30,841)	$ (38,379)
Net deferred tax assets	6,208	6,746
Property, plant and equipment	(897)	(625)
Right-of-use asset	(5,006)	(5,583)
Prepaid Expenses	(305)	(318)
Other, net	0	(220)
Total gross deferred tax liabilities	(6,208)	(6,746)
Net deferred tax assets (liabilities)	$ 0	$ 0