Note C - Discontinued Operations - Financial Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues		$ 8,417		$ 23,172
Manufacturing cost of sales		5,688		14,919
Engineering, selling and administrative		2,080		5,932
Interest expense, net		1		6
Other expense, net		15		41
Income from discontinued operations before income taxes		633		2,274
Income tax provision		145		521
Income from discontinued operations, net of tax	$ 0	$ 488	$ 0	1,753
Depreciation				486
Amortization of finite-lived intangible assets				40
Stock-based compensation expense				362
Capital expenditures				$ 663