CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 83,994	$ 28,182	$ 13,254
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	12,255	12,260	12,546
Amortization of intangibles	0	0	507
Stock-based compensation	27,329	25,212	24,056
Amortization of convertible debt discount	899	1,171	6,308
Amortization of warrant	870	1,734	1,741
Foreign currency remeasurement	1,453	(2,685)	(5,126)
Deferred income taxes, net	(92,856)	4,894	(6,197)
Provision for expected credit losses and returns	2,778	1,954	4,142
Provision for excess and obsolete inventories	7,396	5,988	3,460
Gain on sale of investment in equity securities	0	(4,370)	0
Other adjustments	151	513	181
Changes in operating assets and liabilities:
Accounts receivable	(35,473)	(23,136)	(26,722)
Inventories	35,403	(54,431)	(39,338)
Other assets	25,483	(8,402)	(3,096)
Accounts payable	(29,358)	5,837	42,303
Deferred revenues	(20,823)	2,610	15,014
Other liabilities	(12,442)	8,145	(2,016)
Net cash provided by operating activities	7,059	5,476	41,017
Cash flows from investing activities:
Purchases of investments	(6,305)	0	0
Proceeds from maturities of investments	6,305	0	0
Proceeds from sales of equity investments	0	7,962	0
Purchases of property and equipment	(8,475)	(9,250)	(12,975)
Net cash used in investing activities	(8,475)	(1,288)	(12,975)
Cash flows from financing activities:
Payment of convertible debt	0	(37,707)	0
Payments for debt issuance costs	(1,025)	0	0
Proceeds from other debts	3,835	3,499	3,861
Repayment of other debts	(4,865)	(4,583)	(6,169)
Repurchase of common stock	0	(5,133)	0
Proceeds from common stock issued to employees	6,558	7,092	12,311
Taxes paid related to net share settlement of equity awards	(9,493)	(6,301)	(2,064)
Net cash provided by (used in) financing activities	(4,990)	(43,133)	7,939
Effect of exchange rate changes on cash and cash equivalents	1,089	(4,900)	(1,195)
Net increase (decrease) in cash and cash equivalents	(5,317)	(43,845)	34,786
Cash and cash equivalents, beginning of the year	89,586	133,431	98,645
Cash and cash equivalents, end of the year	84,269	89,586	133,431
Supplemental disclosure of cash flow information:
Income tax payments, net	18,128	9,036	2,525
Interest payments, net	1,626	3,796	4,095
Supplemental schedule of non-cash investing and financing activities:
Capital expenditures incurred but not yet paid	$ 618	$ 1,075	$ 751