Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Net income	$ 30,105	$ 20,636	$ 26,907
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,515	9,433	11,070
Stock-based compensation	5,319	4,173	3,479
Provision for inventory write-downs	2,237	2,572	3,779
Provision (benefit) for deferred income taxes	783	(182)	79
Loss on divestitures	485	1,954	0
Provision for credit losses	344	637	263
Fair value adjustments to contingent consideration obligations	(78)	(108)	(674)
Foreign currency transaction effect on income	(705)	(315)	163
Changes in operating assets and liabilities:
Accounts receivable	(3,135)	(3,533)	(818)
Inventory and other deferred costs	(9,794)	(7,418)	(5,485)
Prepaid expenses and other assets	(2,924)	(3,096)	(1,927)
Accounts payable and other liabilities	4,599	645	(1,734)
Net cash provided by operating activities	36,751	25,378	35,102
Investing activities
Purchases of short-term marketable securities	(16,551)	(8,000)	(59,194)
Purchases of property and equipment	(7,265)	(3,229)	(4,882)
Payments related to acquisitions	(899)	0	0
Proceeds from sale of building	0	858	0
Proceeds from sales of marketable securities	0	0	3,000
Net cash used in investing activities	24,715	10,371	61,076
Financing activities
Common stock cash dividend paid	(12,448)	(10,988)	(9,336)
Proceeds from issuance of common stock	6,170	3,466	63,241
Purchase of treasury stock for net settlement of equity awards	(853)	(642)	(802)
Payment of deferred acquisition consideration	0	(1,070)	(401)
Payments of long-term debt	0	0	(39,000)
Net cash provided by (used in) financing activities	(7,131)	(9,234)	13,702
Effect of exchange rate changes on cash and cash equivalents	230	(494)	(637)
Net increase (decrease) in cash and cash equivalents	5,135	5,279	(12,909)
Cash and cash equivalents at beginning of year	19,134	13,855	26,764
Cash and cash equivalents at end of year	24,269	19,134	13,855
Building [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of building	0	(115)	0
PPE Excluding Building [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of building	$ 0	$ 95	$ 0