Note 17 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Years Ended December 31,
	2023			2022
Revenue:
Electronic Test	$	41,016		$	40,219
Environmental Technologies		30,801			30,172
Process Technologies		51,485			46,437
Total Revenue	$	123,302		$	116,828
Division operating income:
Electronic Test	$	10,189		$	9,931
Environmental Technologies		3,073			3,817
Process Technologies		9,544			8,230
Total division operating income		22,806			21,978
Corporate expenses		(10,272	)		(8,563	)
Acquired intangible amortization		(2,095	)		(2,694	)
Interest expense		(679	)		(635	)
Other income		1,288			59
Earnings before income tax expense	$	11,048		$	10,145

Revenue from External Customers by Geographic Areas [Table Text Block]

	Years Ended December 31,
	2023		2022
Revenue:
U.S.	$	45,222	$	49,096
Foreign		78,080		67,732
	$	123,302	$	116,828

Long-Lived Assets by Geographic Areas [Table Text Block]

	December 31,
	2023		2022
Property and equipment:
U.S.	$	2,502	$	2,658
Foreign		688		474
	$	3,190	$	3,132

Asset [Member]

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	December 31,
	2023		2022
Identifiable assets:
Electronic Test	$	32,505	$	31,143
Environmental Technologies		16,772		18,040
Process Technologies		56,842		56,866
Corporate		28,710		4,017
	$	134,829	$	110,066
Capital expenditures:
Electronic Test	$	599	$	80
Environmental Technologies		495		368
Process Technologies		170		543
Corporate		27		374
	$	1,291	$	1,365