CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment	Common Stock Class A	Common Stock Class A Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment	Common Stock Class B Convertible	Common Stock Class B Convertible Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment	(Accumulated Deficit) Retained Earnings	(Accumulated Deficit) Retained Earnings Cumulative Effect, Period of Adoption, Jan 1, 2021 Adjustment
Beginning Balance at Dec. 31, 2019	$ 508,559		$ 16		$ 2		$ 593,583		$ (658,880)		$ (9,651)		$ 583,489
Beginning Balance (in shares) at Dec. 31, 2019			15,888		2,035				(7,807)
Net loss	(7,524)		$ 0		$ 0		0		$ 0		0		(7,524)
Other comprehensive income (loss)	5,766		0		0		0		0		5,766		0
Conversion of class B to class A common stock	0		$ 0		$ 0		0		0		0		0
Conversion of class B to class A common stock (in shares)			71		(71)
Issuance of class A common stock upon exercise of stock options	51,082		$ 0		$ 0		51,082		$ 0		0		0
Issuance of class A common stock under stock option plans (in shares)			348		0				0
Purchases of treasury stock	(123,224)		$ 0		$ 0		0		$ (123,224)		0		0
Purchases of treasury stock (in shares)			0		0				(877)
Share-based compensation expense	10,576		$ 0		$ 0		10,576		$ 0		0		0
Equity component of convertible senior notes, net of issuance cost and deferred tax liability	107,810		0		0		107,810		0		0		0
Ending Balance at Dec. 31, 2020	$ 553,045	$ (106,853)	$ 16	$ 0	$ 2	$ 0	763,051	$ (107,810)	$ (782,104)	$ 0	(3,885)	$ 0	575,965	$ 957
Ending Balance (in shares) at Dec. 31, 2020			16,307		1,964				(8,684)
Accounting Standards Update Description	ASU 2020-06
Net loss	$ (535,480)		$ 0		$ 0		0		$ 0		0		(535,480)
Other comprehensive income (loss)	(3,658)		0		0		0		0		(3,658)		0
Issuance of class A common stock upon exercise of stock options	40,651		$ 0		$ 0		40,651		$ 0		0		0
Issuance of class A common stock under stock option plans (in shares)			269		0				0
Issuance of class A common stock under employee stock purchase plan	2,854		$ 0		$ 0		2,854		$ 0		0		0
Issuance of class A common stock under employee stock purchase plan, (in shares)			5		0				0
Issuance of class A common stock upon vesting of restricted stock units, net of withholding taxes	(4,754)		$ 0		$ 0		(4,754)		$ 0		0		0
Issuance of class A common stock upon vesting of restricted stock units, net of withholding taxes, (in shares)			11		0				0
Issuance of class A common stock under public offerings, net of issuance costs	990,463		$ 2		$ 0		990,461		$ 0		0		0
Issuance of class A common stock under public offerings, net of issuance costs, (in shares)			1,414		0				0
Share-based compensation expense	42,690		$ 0		$ 0		42,690		$ 0		0		0
Ending Balance at Dec. 31, 2021	978,958		$ 18		$ 2		1,727,143		$ (782,104)		(7,543)		41,442
Ending Balance (in shares) at Dec. 31, 2021			18,006		1,964				(8,684)
Net loss	(1,469,797)		$ 0		$ 0		0		$ 0		0		(1,469,797)
Other comprehensive income (loss)	(6,258)		0		0		0		0		(6,258)		0
Issuance of class A common stock upon exercise of stock options	1,393		$ 0		$ 0		1,393		$ 0		0		0
Issuance of class A common stock under stock option plans (in shares)			9		0				0
Issuance of class A common stock under employee stock purchase plan	4,473		$ 0		$ 0		4,473		$ 0		0		0
Issuance of class A common stock under employee stock purchase plan, (in shares)			16		0				0
Issuance of class A common stock upon vesting of restricted stock units, net of withholding taxes	(2,213)		$ 0		$ 0		(2,213)		$ 0		0		0
Issuance of class A common stock upon vesting of restricted stock units, net of withholding taxes, (in shares)			19		0				0
Issuance of class A common stock under public offerings, net of issuance costs	46,219		$ 0		$ 0		46,219		$ 0		0		0
Issuance of class A common stock under public offerings, net of issuance costs, (in shares)			219		0				0
Share-based compensation expense	64,105		$ 0		$ 0		64,105		$ 0		0		0
Ending Balance at Dec. 31, 2022	$ (383,120)		$ 18		$ 2		$ 1,841,120		$ (782,104)		$ (13,801)		$ (1,428,355)
Ending Balance (in shares) at Dec. 31, 2022			18,269		1,964				(8,684)