CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 68,954	$ 172,161
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	21,147	24,438
Depreciation	15,242	18,678
Amortization of intangible assets	6,490	7,888
Loss on fair value adjustment of derivatives, net	0	240
Impairment of assets	1,071	0
Deferred income taxes	(2,786)	(156,519)
Change in fair value of earn-out liability	(500)	13,800
Other	29	489
Change in operating assets and liabilities:
Accounts receivable	(268)	(8,540)
Unbilled receivables	21,411	53,070
Prepaids and other current assets	270	(421)
Inventories	(16,442)	(12,627)
Income taxes receivable	(9,915)	(28)
Accounts payable	4,051	(9,204)
Accrued salaries and benefits and other liabilities	(4,291)	5,126
Income taxes payable	9,647	(9,158)
Deferred revenue	(1,640)	(7,200)
Operating lease liabilities	(2,929)	(2,845)
Net cash provided by operating activities	109,541	89,348
Cash flows from investing activities:
Purchases of property, plant, and equipment	(14,338)	(14,487)
Purchases of marketable securities	(224,164)	(137,241)
Maturities of marketable securities	160,756	29,155
Proceeds from sales of marketable securities	85,722	87,591
Proceeds from sale of non-marketable equity security	22,796	0
Net cash provided by (used in) investing activities	30,772	(34,982)
Cash flows from financing activities:
Proceeds received from issuance of common stock under employee stock plans	3,351	5,084
Payments of taxes on restricted stock units	(38,593)	(31,921)
Payments under installment payment arrangements	(9,048)	(7,931)
Payments for settlement and repurchase of convertible senior notes	0	(10,381)
Payments for settlement of warrants	0	(10,697)
Payment of deferred purchase consideration from acquisition	(2,450)	(2,450)
Repurchase and retirement of common stock	(63,312)	0
Net cash used in financing activities	(110,052)	(58,296)
Effect of exchange rate changes on cash and cash equivalents	(450)	426
Net increase (decrease) in cash and cash equivalents	29,811	(3,504)
Cash and cash equivalents at beginning of period	94,767	125,694
Cash and cash equivalents at end of period	124,578	122,190
Non-cash operating, investing and financing activities:
Property, plant and equipment received and accrued in accounts payable and other liabilities	6,865	4,226
Operating lease right-of-use assets obtained in exchange for operating lease obligations	3,034	0
Issuance of common stock in connection with the payment of year 1 earn-out related to the PLDA acquisition	$ 0	$ 5,022