CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2021	$ 141	$ 1,964,167	$ (32,668)	$ (1,159,903)	$ 771,737
Balance (in shares) at Dec. 31, 2021	141,210
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(170,300)	(170,300)
Change in unrealized gains (losses), net of tax	0	0	(20,774)	0	(20,774)
Foreign currency translation	0	0	(565)	0	(565)
Issuance of common stock in connection with employee stock plans	$ 1	3,461	0	0	3,462
Issuance of common stock in connection with employee stock plans (in shares)	935
Stock-based compensation expense	$ 0	50,738	0	0	50,738
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options	$ 0	(9,572)	0	0	(9,572)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares)	(314)
Balance at Jun. 30, 2022	$ 142	2,008,794	(54,007)	(1,330,203)	624,726
Balance (in shares) at Jun. 30, 2022	141,831
Balance at Mar. 31, 2022	$ 142	1,983,078	(48,578)	(1,225,068)	709,574
Balance (in shares) at Mar. 31, 2022	141,753
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(105,135)	(105,135)
Change in unrealized gains (losses), net of tax	0	0	(5,018)	0	(5,018)
Foreign currency translation	0	0	(411)	0	(411)
Issuance of common stock in connection with employee stock plans	$ 0	1,614	0	0	1,614
Issuance of common stock in connection with employee stock plans (in shares)	87
Stock-based compensation expense	$ 0	24,502	0	0	24,502
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options	$ 0	(400)	0	0	(400)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares)	(9)
Balance at Jun. 30, 2022	$ 142	2,008,794	(54,007)	(1,330,203)	624,726
Balance (in shares) at Jun. 30, 2022	141,831
Balance at Dec. 31, 2022	$ 142	2,059,850	(57,480)	(1,429,625)	572,887
Balance (in shares) at Dec. 31, 2022	142,058
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(209,613)	(209,613)
Change in unrealized gains (losses), net of tax	0	0	6,393	0	6,393
Foreign currency translation	0	0	174	0	174
Issuance of common stock in connection with employee stock plans	$ 1	4,949	0	0	4,950
Issuance of common stock in connection with employee stock plans (in shares)	1,109
Stock-based compensation expense	$ 0	53,510	0	0	53,510
Balance at Jun. 30, 2023	$ 143	2,118,309	(50,913)	(1,639,238)	428,301
Balance (in shares) at Jun. 30, 2023	143,167
Balance at Mar. 31, 2023	$ 143	2,089,358	(48,983)	(1,553,948)	486,570
Balance (in shares) at Mar. 31, 2023	143,023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(85,290)	(85,290)
Change in unrealized gains (losses), net of tax	0	0	(2,000)	0	(2,000)
Foreign currency translation	0	0	70	0	70
Issuance of common stock in connection with employee stock plans	$ 0	2,390	0	0	2,390
Issuance of common stock in connection with employee stock plans (in shares)	144
Stock-based compensation expense	$ 0	26,561	0	0	26,561
Balance at Jun. 30, 2023	$ 143	$ 2,118,309	$ (50,913)	$ (1,639,238)	$ 428,301
Balance (in shares) at Jun. 30, 2023	143,167