Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities
Net income	$ 10,230	$ 11,603
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,213	29,981
Stock-based compensation expense	11,811	13,335
Deferred taxes	(9,197)	(8,920)
Interest on finance lease obligations	859	0
Loss on foreign currency translation	3,906	0
Impairments related to closure of Japan business	0	2,842
Gain on disposal of property and equipment	(498)	(1,174)
Other	122	11
Changes in operating assets and liabilities:
Accounts receivable	(3,058)	(3,909)
Inventories	(150)	(1,613)
Prepaid expenses and other	4,127	(920)
Income taxes	4,693	670
Accounts payable	746	1,292
Accrued liabilities and other	4,242	8,366
Net cash provided by operating activities	56,046	51,564
Investing activities
Purchases of property, equipment and other capital assets	(9,935)	(16,414)
Proceeds from sales of property, equipment and other capital assets	693	3,227
Purchases of marketable securities	0	(45,872)
Proceeds from sales of marketable securities	0	1,998
Proceeds from call redemptions and maturities of marketable securities	19,115	13,696
Net cash provided by (used in) investing activities	9,873	(43,365)
Financing activities
Proceeds from exercises of stock options	1,986	2,311
Purchases of shares withheld for tax obligations	(1,436)	(1,615)
Repurchases of common stock	(39,053)	(13,074)
Principal repayments of finance lease obligations	(234)	(417)
Net cash used in financing activities	(38,737)	(12,795)
Effect of exchange rate changes on cash and cash equivalents	(244)	(1,972)
Net increase (decrease) in cash and cash equivalents	26,938	(6,568)
Cash and cash equivalents, beginning of period	56,558	65,929
Cash and cash equivalents, end of period	$ 83,496	$ 59,361