Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The change in the carrying amount of goodwill by segment is as follows (in thousands):

	Total		Measurement Systems
			KELK Acquisition		DSI Acquisition		Stress-Tek Acquisition		Pacific Instruments Acquisition		DTS Acquisition
Balance at January 1, 2020	$	35,018	$	6,559	$	18,606	$	6,311	$	3,542	$	—
Adjustment to goodwill acquired	(1,700)		—		(1,700)		—		—		—
Impairment charges	(2,416)		—		—		—		(2,416)		—
Foreign currency translation adjustment	203		167		36		—		—		—
Balance at December 31, 2020	31,105		6,726		16,942		6,311		1,126		—
Goodwill acquired	15,903		—		—		—		—		15,903
Impairment charges	(1,126)		—		—		—		(1,126)		—
Foreign currency translation adjustment	(52)		(20)		(32)		—		—		—
Balance at December 31, 2021	$	45,830	$	6,706	$	16,910	$	6,311	$	—	$	15,903

Schedule of Finite-Lived Intangible Assets

Intangible assets were as follows (in thousands):

	December 31,
	2021		2020
Intangible assets subject to amortization
(Definite-lived):
Patents and acquired technology	$	33,026	$	19,804
Customer relationships	34,036		26,061
Trade names	1,665		1,747
Non-competition agreements	11,335		12,259
	80,062		59,871
Accumulated amortization:
Patents and acquired technology	(7,430)		(5,895)
Customer relationships	(14,918)		(13,363)
Trade names	(1,665)		(1,747)
Non-competition agreements	(11,329)		(12,250)
	(35,342)		(33,255)
Net intangible assets subject to amortization	$	44,720	$	26,616
Intangible assets not subject to amortization
(Indefinite-lived):
Trade names	7,717		5,423
	$	52,437	$	32,039

Schedule of Expected Amortization Expense

Estimated annual amortization expense for each of the next five years is as follows (in thousands):

2022	$	3,873
2023	3,767
2024	3,734
2025	3,733
2026	3,733