Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities
Net income	$ 85,941	$ 151,036
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,152	11,542
Deferred income taxes	(1,756)	(5,510)
Stock-based compensation expense	15,668	15,571
Provision for doubtful accounts	0	2,984
Provision for excess and obsolete inventory	2,625	4,120
Accretion of discounts and premiums on short-term and long-term investments	(3,335)	(10,167)
Unrealized currency gain on foreign denominated transactions	(2,229)	(3,100)
Mark-to-market adjustment on forward exchange contracts	585	583
Changes in operating assets and liabilities:
Accounts receivable	58,764	28,774
Inventories	(34,248)	11,299
Prepaid expenses and other current assets	3,323	(8,110)
Accounts payable and other current liabilities	1,365	(2,738)
Deferred revenue	(10,063)	(46,700)
Income taxes	2,180	(14,132)
Other assets and liabilities	(7,100)	(7,414)
Net cash provided by operating activities	124,872	128,038
Cash flows from investing activities
Expenditures for property, plant and equipment and capitalized software	(8,960)	(7,523)
Purchases of short-term and long-term investments	(506,626)	(433,894)
Maturities and sales of short-term investments	552,820	323,570
Net cash provided by (used in) investing activities	37,234	(117,847)
Cash flows from financing activities
Net settlement on restricted stock grants	(4,256)	(11,408)
Repurchase of common stock	(95,850)	(45,358)
Proceeds from Employee Stock Purchase Plan purchases	1,246	1,242
Principal payments on finance lease obligation	(1,012)	(1,125)
Net cash used in financing activities	(99,872)	(56,649)
Effect of exchange rate changes on cash and cash equivalents	1,829	(774)
Net increase (decrease) in cash, cash equivalents and restricted cash	64,063	(47,232)
Cash, cash equivalents and restricted cash at beginning of period	131,064	173,951
Cash, cash equivalents and restricted cash at end of period	$ 195,127	$ 126,719