Note A - Overview and Significant Accounting Policies - Operations in Different Geographic (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Revenue	[1]	$ 206,278	$ 194,596
Property, plant and equipment	[2]	10,523	7,747
UNITED STATES
Revenue	[1]	183,470	175,437
Property, plant and equipment	[2]	10,219	7,549
Non-US [Member]
Revenue	[1]	22,808	19,159
Property, plant and equipment	[2]	$ 304	$ 198

[1] Geographic revenues are based on the location of the service being performed.

[2] Property, plant and equipment are based on physical location.