Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net income	$ 11,603	$ 21,462
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,981	30,231
Stock-based compensation expense	13,335	15,539
Deferred taxes	(8,920)	(139)
Fair value of contingent consideration	0	(8,513)
Impairments related to closure of Japan business	2,842	0
Gain on disposal of property and equipment	(1,174)	0
Other	11	442
Changes in operating assets and liabilities:
Accounts receivable	(3,909)	(25,615)
Inventories	(1,613)	950
Prepaid expenses and other	(920)	1,009
Income taxes	670	(1,226)
Accounts payable	1,292	1,978
Accrued liabilities and other	8,366	(3,893)
Net cash provided by operating activities	51,564	32,225
Investing activities
Purchases of property, equipment and other capital assets	(16,414)	(27,956)
Proceeds from sales of property, equipment and other capital assets	3,227	0
Cash used for acquisitions, net of cash acquired	0	(127,413)
Purchases of marketable securities	(45,872)	(15,159)
Proceeds from sales of marketable securities	1,998	57,089
Proceeds from call redemptions and maturities of marketable securities	13,696	15,114
Net cash used in investing activities	(43,365)	(98,325)
Financing activities
Proceeds from exercises of stock options	2,311	3,838
Purchases of shares withheld for tax obligations	(1,615)	(4,209)
Repurchases of common stock	(13,074)	(13,036)
Principal repayments of finance lease obligations	(417)	(413)
Net cash used in financing activities	(12,795)	(13,820)
Effect of exchange rate changes on cash and cash equivalents	(1,972)	119
Net decrease in cash and cash equivalents	(6,568)	(79,801)
Cash and cash equivalents, beginning of period	65,929	127,603
Cash and cash equivalents, end of period	$ 59,361	$ 47,802