CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities:
Net income	$ 24,094	$ 13,643	$ 17,022
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	18,107	15,985	14,857
Deferred income taxes	(6,135)	(519)	(112)
Provision for excess and obsolete inventory	534	1,106	408
Provision for warranty	543	34	210
Debt issue cost amortization recorded in interest expense	141	144	174
Stock-based compensation expense	4,161	3,550	3,203
Other	(128)	(333)	263
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables	(170)	2,711	(1,456)
Inventories	(22,874)	(4,686)	70
Prepaid expenses and other assets	(3,670)	(2,264)	(517)
Accounts payable	8,293	(1,874)	(1,809)
Accrued liabilities	2,506	(2,659)	2,217
Net cash provided by operating activities	25,402	24,838	34,530
Cash Flows From Investing Activities:
Consideration paid for acquisitions, net of cash acquired	(47,254)	(14,728)
Purchase of property and equipment	(13,716)	(9,371)	(14,882)
Net cash used in investing activities	(60,970)	(24,099)	(14,882)
Cash Flows From Financing Activities:
Principal payments of long-term debt	(12,248)	(16,897)	(22,500)
Proceeds from issuance of long-term debt	51,379	26,979	9,639
Payment of debt issuance costs		(401)
Dividends paid to stockholders	(1,371)	(1,160)	(1,170)
Tax withholdings related to net share settlements of restricted stock	(1,928)	(1,032)	(746)
Net cash provided by (used in) financing activities	35,832	7,489	(14,777)
Effect of foreign exchange rate changes on cash	(932)	1,487	(128)
Net (decrease) increase in cash and cash equivalents	(668)	9,715	4,743
Cash and cash equivalents at beginning of period	23,131	13,416	8,673
Cash and cash equivalents at end of period	22,463	23,131	13,416
Supplemental disclosure of cash flow information:
Interest paid	3,055	3,586	5,342
Income taxes paid	3,869	8,563	2,051
Supplemental non-cash investing and financing activities:
Accrued consideration for acquisitions	$ 24,364
Stock issued for acquisitions	23,496
Contingent consideration for acquisition	$ 4,900
Property, plant and equipment purchases in accounts payable or accrued expenses	$ 835	$ 596	$ 378