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 (loss)	$ 90,954	$ (2,002)	$ 2,623
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	27,257	24,321	16,408
Stock-based compensation	50,516	37,378	65,763
Inventory write-offs and write-downs	6,198	3,445	2,818
Deferred taxes	(19,061)	1,458	(14,091)
Acquired in-process research and development	18,215	0	0
Other	2,338	1,274	2,692
Changes in operating assets and liabilities:
Accounts receivable	(266)	(69,857)	(21,344)
Inventories	(67,710)	(74,631)	(51,554)
Prepaid expenses and other current and non-current assets	(18,909)	(1,237)	(13,032)
Accounts payable	1,097	13,385	(1,565)
Accrued expenses and other non-current liabilities	6,221	10,542	17,076
Proceeds from lease incentives	483	263	3,708
Net cash provided by (used in) operating activities	97,333	(55,661)	9,502
CASH FLOWS FROM INVESTING ACTIVITIES:
Asset acquisition, net of cash acquired	(988)	0	0
Cash acquired in a business combination	0	0	2,919
Purchases of marketable investments	(81,940)	0	(126,794)
Proceeds from sales of marketable investments	0	1,180	2,000
Proceeds from maturities of marketable investments	82,565	72,908	121,720
Purchases of property and equipment	(15,213)	(19,298)	(21,180)
Other	(500)	0	(400)
Net cash (used in) provided by investing activities	(16,076)	54,790	(21,735)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercises of stock options	5,517	7,786	4,664
Proceeds from issuance of stock under employee stock purchase plan	14,896	13,766	13,705
Payment of employee taxes related to vested common and restricted stock	(2,074)	(8,042)	(15,832)
Payments of finance lease obligations	(1,981)	(1,751)	(1,451)
Other	(155)	(137)	(250)
Net cash provided by financing activities	16,203	11,622	836
Effect of foreign exchange rate changes on cash and cash equivalents	168	(272)	1,106
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	97,628	10,479	(10,291)
CASH AND CASH EQUIVALENTS—Beginning of period	69,858	59,379	69,670
CASH AND CASH EQUIVALENTS—End of period	167,486	69,858	59,379
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for income taxes	6,557	2,919	1,496
NONCASH INVESTING AND FINANCING ACTIVITIES:
Right-of-use assets obtained in exchange for operating lease obligations	9,339	72,279	101,510
Right-of-use assets obtained in exchange for finance lease obligations	1,118	305	1,346
Purchase of property and equipment funded through accounts payable and accrued liabilities	1,182	2,293	2,330
Shares
NONCASH INVESTING AND FINANCING ACTIVITIES:
Fair value of stock issued in connection with acquisition	17,227	0	174,133
Stock Options
NONCASH INVESTING AND FINANCING ACTIVITIES:
Fair value of stock issued in connection with acquisition	$ 0	$ 0	$ 80,693