CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 118,238	$ 68,954
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	25,616	21,147
Depreciation	16,605	15,242
Amortization of intangible assets	3,434	6,490
Deferred income taxes	4,618	(2,786)
Impairment of assets	0	1,071
Change in fair value of earn-out liability	0	(500)
Other	1	29
Change in operating assets and liabilities:
Accounts receivable	15,695	(268)
Unbilled receivables	(1,006)	21,411
Prepaids and other current assets	(661)	270
Inventories	6,031	(16,442)
Income taxes receivable	(11,350)	(9,915)
Accounts payable	(8,545)	4,051
Accrued salaries and benefits and other liabilities	(2,878)	(4,291)
Income taxes payable	9,845	9,647
Deferred revenue	(1,272)	(1,640)
Operating lease liabilities	(2,598)	(2,929)
Net cash provided by operating activities	171,773	109,541
Cash flows from investing activities:
Purchases of property and equipment	(14,379)	(14,338)
Purchases of marketable securities	(303,836)	(224,164)
Maturities of marketable securities	178,628	160,756
Proceeds from sales of marketable securities	0	85,722
Proceeds from sale of non-marketable equity security	0	22,796
Net cash provided by (used in) investing activities	(139,587)	30,772
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock plans	3,743	3,351
Payments of taxes on restricted stock units	(34,997)	(38,593)
Payments under installment payment arrangements	(7,686)	(9,048)
Payment of deferred purchase consideration from acquisition	0	(2,450)
Repurchase and retirement of common stock	(5,810)	(63,312)
Net cash used in financing activities	(44,750)	(110,052)
Effect of exchange rate changes on cash and cash equivalents	548	(450)
Net increase (decrease) in cash and cash equivalents	(12,016)	29,811
Cash and cash equivalents at beginning of period	99,775	94,767
Cash and cash equivalents at end of period	87,759	124,578
Non-cash operating, investing and financing activities:
Property and equipment received and accrued in accounts payable and other liabilities	25,983	6,865
Operating lease right-of-use assets obtained in exchange for operating lease obligations	$ 0	$ 3,034