Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities
Net income	$ 2,276	$ 7,652
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,883	20,274
Stock-based compensation expense	7,370	8,428
Deferred taxes	(5,605)	(5,653)
Interest on finance lease obligations	568	0
Loss on foreign currency translation	3,906	0
Impairments related to closure of Japan business	0	1,792
Gain on disposal of property and equipment	(428)	0
Other	215	32
Changes in operating assets and liabilities:
Accounts receivable	1,106	(5,748)
Inventories	(551)	(1,783)
Prepaid expenses and other	4,193	(298)
Income taxes	3,524	(1,250)
Accounts payable	(961)	(521)
Accrued liabilities and other	(2,629)	8,115
Net cash provided by operating activities	31,867	31,040
Investing activities
Purchases of property, equipment and other capital assets	(6,829)	(6,030)
Proceeds from sales of property, equipment and other capital assets	623	0
Purchases of marketable securities	0	(38,882)
Proceeds from sales of marketable securities	0	1,000
Proceeds from call redemptions and maturities of marketable securities	14,020	7,396
Net cash provided by (used in) investing activities	7,814	(36,516)
Financing activities
Proceeds from exercises of stock options	1,986	2,311
Purchases of shares withheld for tax obligations	(1,425)	(1,615)
Repurchases of common stock	(30,064)	(5,239)
Principal repayments of finance lease obligations	(163)	(278)
Net cash used in financing activities	(29,666)	(4,821)
Effect of exchange rate changes on cash and cash equivalents	(80)	(966)
Net increase (decrease) in cash and cash equivalents	9,935	(11,263)
Cash and cash equivalents, beginning of period	56,558	65,929
Cash and cash equivalents, end of period	$ 66,493	$ 54,666