Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net (loss) income	$ (103,462)	$ 33,372	$ 50,867
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	39,425	40,488	32,594
Stock-based compensation expense	17,545	19,095	14,673
Deferred taxes	(9,499)	339	7,577
Changes in fair value of contingent consideration	0	(13,253)	0
Impairments related to closure of Japan business	2,842	0	0
Gain on disposal of property and equipment	(1,211)	0	0
Other	35	842	79
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	1,632	(20,112)	(91)
Inventories	(310)	(2,390)	(662)
Prepaid expenses and other	(2,081)	64	(1,680)
Income taxes	(2,681)	(774)	(1,960)
Accounts payable	1,375	4,654	1,492
Accrued liabilities and other	461	(7,083)	4,080
Net cash provided by operating activities	62,079	55,242	106,969
Investing activities
Purchases of property, equipment and other capital assets	(21,686)	(34,209)	(47,010)
Proceeds from sales of property, equipment and other capital assets	4,108	0	0
Cash used for acquisitions, net of cash acquired	0	(127,413)	0
Purchases of other assets and investments	0	0	(3,000)
Purchases of marketable securities	(46,872)	(16,159)	(113,200)
Proceeds from sales of marketable securities	1,998	64,913	0
Proceeds from maturities of marketable securities	19,360	18,204	67,737
Net cash used in investing activities	(43,092)	(94,664)	(95,473)
Financing activities
Proceeds from issuance of common stock from equity plans	3,950	5,862	7,557
Purchases of shares withheld for tax obligations	(1,682)	(4,225)	(3,443)
Repurchases of common stock	(29,659)	(23,279)	(14,686)
Principal repayments of finance lease obligations	(531)	(552)	(154)
Other	0	4	0
Net cash used in financing activities	(27,922)	(22,198)	(10,726)
Effect of exchange rate changes on cash and cash equivalents	(436)	(54)	1,608
Net (decrease) increase in cash and cash equivalents	(9,371)	(61,674)	2,378
Cash and cash equivalents, beginning of period	65,929	127,603	125,225
Cash and cash equivalents, end of period	56,558	65,929	127,603
Supplemental cash flow disclosure
Cash paid for interest	101	28	23
Cash paid for taxes	19,160	7,583	5,650
Europe [Member]
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	6,770	7,101	5,024
Goodwill impairment	118,008	0	0
Investing activities
Purchases of property, equipment and other capital assets	$ (4,137)	$ (7,378)	$ (16,574)