Net Loss Per Share Attributable to Common Stockholders - Schedule of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended						9 Months Ended
		Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net loss from continuing operations		$ (34,275)			$ (259,700)			$ (135,849)	$ (376,365)
Net loss from discontinued operations		(18,760)			(18,276)			(45,689)	(81,505)
Net loss attributable to common stockholders		$ (53,035)	$ (59,103)	$ (69,400)	$ (277,976)	$ (75,270)	$ (104,624)	$ (181,538)	$ (457,870)
Denominator:
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	[1]	26,349,226			24,040,478			25,567,008	23,634,161
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	[1]	26,349,226			24,040,478			25,567,008	23,634,161
Net loss per share attributable to common stockholders:
Net loss per share from continuing operations, basic (in usd per share)	[1]	$ (1.30)			$ (10.80)			$ (5.31)	$ (15.92)
Net loss per share from continuing operations, diluted (in usd per share)	[1]	(1.30)			(10.80)			(5.31)	(15.92)
Net loss per share from discontinued operations, basic (in usd per share)	[1]	(0.71)			(0.76)			(1.79)	(3.45)
Net loss per share from discontinued operations, diluted (in usd per share)	[1]	(0.71)			(0.76)			(1.79)	(3.45)
Net loss per share attributable to common stockholders, basic (in usd per share)	[1]	(2.01)			(11.56)			(7.10)	(19.37)
Net loss per share attributable to common stockholders, diluted (in usd per share)	[1]	$ (2.01)			$ (11.56)			$ (7.10)	$ (19.37)
Class A Common Stock
Numerator:
Net loss from continuing operations		$ (24,671)			$ (169,234)			$ (94,220)	$ (242,789)
Net loss from discontinued operations		(13,503)			(11,910)			(31,688)	(52,578)
Net loss attributable to common stockholders		$ (38,174)			$ (181,144)			$ (125,908)	$ (295,367)
Denominator:
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)		18,966,093			15,666,014			17,732,377	15,246,120
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)		18,966,093			15,666,014			17,732,377	15,246,120
Net loss per share attributable to common stockholders:
Net loss per share from continuing operations, basic (in usd per share)		$ (1.30)			$ (10.80)			$ (5.31)	$ (15.92)
Net loss per share from discontinued operations, basic (in usd per share)		(0.71)			(0.76)			(1.79)	(3.45)
Net loss per share attributable to common stockholders, basic (in usd per share)		(2.01)			(11.56)			(7.10)	(19.37)
Net loss per share attributable to common stockholders, diluted (in usd per share)		$ (2.01)			$ (11.56)			$ (7.10)	$ (19.37)
Class B Common Stock
Numerator:
Net loss from continuing operations		$ (9,604)			$ (90,466)			$ (41,629)	$ (133,576)
Net loss from discontinued operations		(5,257)			(6,366)			(14,001)	(28,927)
Net loss attributable to common stockholders		$ (14,861)			$ (96,832)			$ (55,630)	$ (162,503)
Denominator:
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)		7,383,133			8,374,464			7,834,631	8,388,041
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)		7,383,133			8,374,464			7,834,631	8,388,041
Net loss per share attributable to common stockholders:
Net loss per share from continuing operations, basic (in usd per share)		$ (1.30)			$ (10.80)			$ (5.31)	$ (15.92)
Net loss per share from discontinued operations, basic (in usd per share)		(0.71)			(0.76)			(1.79)	(3.45)
Net loss per share attributable to common stockholders, basic (in usd per share)		(2.01)			(11.56)			(7.10)	(19.37)
Net loss per share attributable to common stockholders, diluted (in usd per share)		$ (2.01)			$ (11.56)			$ (7.10)	$ (19.37)

[1] Amounts have been adjusted to reflect the reverse stock split that became effective on October 16, 2024. Refer to Note 12, “Stockholders' Equity,” for further information about the reverse stock split.