Unaudited Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Beginning Balance, Amount at Dec. 31, 2021	$ 873,799	$ 47		$ 1,436,089	$ (1,339)	$ (560,998)
Beginning Balance, Shares at Dec. 31, 2021		47,390	910
Issuance of common stock under stock plans	2,145	$ 1		2,144
Issuance of common stock under stock plans, Shares		250
Restricted stock units taxes paid in cash	(4,354)			(4,354)
Stock-based compensation	46,436			46,436
Conversion of the 2025 Notes	(691)			(691)
Cumulative adjustment from adoption of convertible debt standard	(69,801)			(101,167)		31,366
Cumulative translation adjustment	(356)				(356)
Unrealized gain on investments, net of income taxes	(4,001)				(4,001)
Net loss	(9,341)					(9,341)
Ending Balance, Amount at Mar. 31, 2022	833,836	$ 48		1,378,457	(5,696)	(538,973)
Ending Balance, Shares at Mar. 31, 2022		47,640	910
Beginning Balance, Amount at Dec. 31, 2022	992,224	$ 49		1,647,446	(12,890)	(642,381)
Beginning Balance, Shares at Dec. 31, 2022		49,217	910
Issuance of common stock under stock plans	1,196			1,196
Issuance of common stock under stock plans, Shares		260
Restricted stock units taxes paid in cash	(1,198)			(1,198)
Restricted stock units taxes paid in cash, Shares		(4)
Stock-based compensation	87,305			87,305
Cumulative translation adjustment	627				627
Unrealized gain on investments, net of income taxes	4,507				4,507
Net loss	(38,282)					(38,282)
Ending Balance, Amount at Mar. 31, 2023	$ 1,046,379	$ 49		$ 1,734,749	$ (7,756)	$ (680,663)
Ending Balance, Shares at Mar. 31, 2023		49,473	910