Note A - Overview and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	Year Ended December 31,
In thousands	2020		2019
Revenue (1)
United States	$	156,688	$	194,230
Other countries		20,212		23,347
Total revenue	$	176,900	$	217,577

	December 31,
In thousands	2020		2019
Property, plant and equipment (2)
United States	$	5,495	$	7,221
Other countries		383		1,102
Total property, plant and equipment	$	5,878	$	8,323

Schedule of Allowance for Doubtful Accounts [Table Text Block]

	Year Ended December 31,
In thousands	2020			2019
Balance at beginning of year	$	666		$	430
Net charges to expense		115			351
Amounts recovered against the allowance		(540	)		(115	)
Balance at end of year	$	241		$	666

Property, Plant and Equipment [Table Text Block]

	Years
Buildings and improvements	3 to 40
Software	2 to 10
Equipment and furniture	3 to 20