Note C - Discontinued Operations - Financial Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues		$ 7,691
Manufacturing cost of sales		(4,819)
Engineering, selling and administrative		(1,804)
Interest expense, net		(3)
Other expense, net		(17)
Income from discontinued operations before income taxes		1,048
Income tax provision		240
Income from discontinued operations, net of tax	$ 0	808
Depreciation		148
Amortization of finite-lived intangible assets		13
Stock-based compensation expense		219
Capital expenditures		$ 207