Note C - Discontinued Operations - Financial Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues		$ 7,064		$ 14,755
Manufacturing cost of sales		(4,412)		(9,231)
Engineering, selling and administrative		(2,048)		(3,852)
Interest expense, net		(2)		(5)
Other expense, net		(9)		(26)
Income from discontinued operations before income taxes		593		1,641
Income tax provision		136		376
Income from discontinued operations, net of tax	$ 0	$ 457	$ 0	1,265
Depreciation				313
Amortization of finite-lived intangible assets				27
Stock-based compensation expense				287
Capital expenditures				$ 395