Employee Benefit Plans - Stock Activity, Weighted Average Exercise Price (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Shares
Granted (in shares)	7,107,625		6,782,043	7,420,625	6,876,593
Stock option activity additional disclosures
Compensation cost	$ 22,746,000		$ 36,861,000	$ 33,118,000	$ 77,049,000
Options granted	7,107,625		6,782,043	7,420,625	6,876,593
Service Stock Options Awards
Shares
Options outstanding, beginning balance (in shares)		17,336,362		17,336,362
Options exercisable, beginning balance (in shares)		8,288,944		8,288,944
Options unvested, beginning balance (in shares)		9,047,418		9,047,418
Granted (in shares)				4,968,125
Exercised (in shares)				(32,500)
Forfeited (in shares)				(2,018,782)
Options outstanding, end balance (in shares)	20,253,205			20,253,205		17,336,362
Options exercisable, ending balance (in shares)	7,954,524			7,954,524		8,288,944
Options unvested, ending balance (in shares)	12,298,681			12,298,681		9,047,418
Weighted Average Exercise Price
Options outstanding, beginning balance, weighted-average exercise price		$ 11.37		$ 11.37
Options exercisable, beginning balance, weighted-average exercise price		11.84		11.84
Options unvested, beginning balance, weighted-average exercise price		$ 10.94		10.94
Granted, weighted-average exercise price				2.51
Exercised, weighted-average exercise price				2.15
Forfeited, weighted-average exercise price				18.42
Options outstanding, ending balance, weighted-average exercise price	$ 8.51			8.51		$ 11.37
Options exercisable, ending balance, weighted-average exercise price	11.15			11.15		11.84
Options unvested, ending balance, weighted-average exercise price	$ 6.80			$ 6.80		$ 10.94
Stock option activity additional disclosures
Options outstanding, weighted-average remaining contractual term				7 years 6 months 10 days		7 years 10 months 9 days
Options exercisable, weighted-average remaining contractual term				5 years 7 months 28 days		6 years 2 months 4 days
Options unvested, weighted-average remaining contractual term				8 years 9 months		9 years 4 months 20 days
Options outstanding, aggregate intrinsic value	$ 464,000			$ 464,000		$ 11,391,000
Options exercisable, aggregate intrinsic value	464,000			$ 464,000		7,250,000
Options unvested, aggregate intrinsic value						$ 4,141,000
Weighted-average grant date fair value of options granted (per share)				$ 1.78	$ 6.76
Fair value of stock options that vested during the period				$ 8,200,000	$ 9,800,000
Compensation cost	5,400,000		$ 6,900,000	12,300,000	15,200,000
Unrecognized compensation cost	$ 39,700,000			$ 39,700,000
Period for recognition				1 year 11 months 23 days
Intrinsic fair value of options exercised				$ 39,000	$ 1,800,000
Options granted				4,968,125
Performance Stock Option Awards
Shares
Options outstanding, beginning balance (in shares)		21,925,000		21,925,000
Options exercisable, beginning balance (in shares)		2,782,000		2,782,000
Options unvested, beginning balance (in shares)		19,143,000		19,143,000
Granted (in shares)				2,452,500
Exercised (in shares)				0	0
Forfeited (in shares)				(2,250,000)
Options outstanding, end balance (in shares)	22,127,500			22,127,500		21,925,000
Options exercisable, ending balance (in shares)	4,038,667			4,038,667		2,782,000
Options unvested, ending balance (in shares)	18,088,833			18,088,833		19,143,000
Weighted Average Exercise Price
Options outstanding, beginning balance, weighted-average exercise price		$ 21.32		$ 21.32
Options exercisable, beginning balance, weighted-average exercise price		26.9		26.9
Options unvested, beginning balance, weighted-average exercise price		$ 20.50		20.50
Granted, weighted-average exercise price				2.41
Options outstanding, ending balance, weighted-average exercise price	$ 19.33			19.33		$ 21.32
Options exercisable, ending balance, weighted-average exercise price	20.99			20.99		26.9
Options unvested, ending balance, weighted-average exercise price	$ 18.96			$ 18.96		$ 20.50
Stock option activity additional disclosures
Options outstanding, weighted-average remaining contractual term				4 years 11 months 8 days		5 years 3 months 7 days
Options granted, weighted-average remaining contractual term				6 years 9 months 25 days
Options exercisable, weighted-average remaining contractual term				4 years 8 months 26 days		4 years 8 months 12 days
Options unvested, weighted-average remaining contractual term				4 years 11 months 23 days		5 years 4 months 6 days
Weighted-average grant date fair value of options granted (per share)				$ 0.53	$ 4.32
Fair value of stock options that vested during the period				$ 5,600,000	$ 0
Option expected to vest (in shares)	3,904,333			3,904,333
Unvested stock options expected to vest period for calculation of weighted- average exercise price				5 years 3 months 14 days
Unvested stock options, weighted- average exercise price	$ 14.66			$ 14.66
Compensation cost	$ 7,900,000		$ 17,900,000	$ 1,800,000	$ 35,300,000
Unvested performance stock options forfeited		$ 15,200,000
Non-cash compensation expense reversals compensation cost				17,000,000.0
Unrecognized compensation cost	14,400,000			14,400,000
Aggregate intrinsic value of unvested performance stock options	$ 0			$ 0
Period for recognition				1 year 5 months 4 days
Options granted				2,452,500