Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net income	$ 14,228	$ 6,674
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,261	3,177
Stock-based compensation	1,796	1,582
Fair value adjustment to contingent consideration obligations	99	113
Provision for doubtful accounts	133	142
Provision for inventory write-downs	2,154	609
Foreign currency transaction loss	(14)	163
Changes in operating assets and liabilities:
Accounts receivable	(1,486)	441
Inventory and other deferred costs	(2,044)	(4,076)
Prepaid expenses and other assets	447	(197)
Accounts payable and other liabilities	(4,603)	(2,092)
Net cash provided by operating activities	15,971	6,536
Investing activities
Purchases of property and equipment and other assets	(2,462)	(1,174)
Payments related to acquisitions	0	(72,559)
Purchases of short-term marketable securities	0	(2,178)
Proceeds from sales of marketable securities	0	18,000
Net cash used in investing activities	(2,462)	(57,911)
Financing activities
Payment of long-term debt	(16,000)	0
Proceeds from revolving line of credit	0	25,000
Proceeds from issuance of long-term debt	0	40,000
Payment of deferred debt issuance costs	0	(1,751)
Proceeds from issuance of common stock	2,113	276
Purchase of treasury stock for net settlement of equity awards	(88)	(57)
Common stock cash dividend paid	(4,529)	(3,834)
Net cash provided by (used in) financing activities	(18,504)	59,634
Effect of exchange rate changes on cash and cash equivalents	(228)	(69)
Net increase in cash and cash equivalents	(5,223)	8,190
Cash and cash equivalents at beginning of period	26,764	11,786
Cash and cash equivalents at end of period	$ 21,541	$ 19,976