BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Warranty, Accrued Liabilities, and Basic and Diluted Income per Share (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in the reserve for product warranty claims
Warranty reserve at beginning of the year	$ 1,869	$ 1,571	$ 1,075
Warranty reserves acquired	45	15	465
Provision	(66)	543	34
Warranty expenditures	409	(204)	(97)
Effect of foreign currency translation	(97)	(56)	94
Warranty reserve at end of year	2,160	1,869	1,571
ACCRUED LIABILITIES
Compensation and fringe benefits	15,818	14,666
Accrued business acquisition consideration	12,500	12,388
Warranty reserve	2,160	1,869	$ 1,571
Operating lease liabilities - current	$ 4,224	$ 4,532
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Finance lease obligations, current	$ 377
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Deferred revenue	$ 4,807	$ 2,425
Other accrued expenses	8,235	5,776
Accrued liabilities	$ 48,121	$ 41,656
Basic and Diluted Income per Share
Basic weighted average shares outstanding	15,448	14,413	14,243
Dilutive effect of potential common shares	503	104	90
Diluted weighted average shares outstanding	15,951	14,517	14,333
Minimum
Warranty
Warranty period	3 months
Maximum
Warranty
Warranty period	2 years