Warrants, Redeemable Convertible Preferred Stock and Stockholders' Deficit - Schedule of Redeemable Convertible Preferred Stock (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2024
Series Seed Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 2,473	$ 2,473
Beginning balance (in shares)	5,045,368	5,045,368
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 2,473	$ 2,473
Ending balance (in shares)	5,045,368	5,045,368
Series A Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 5,179	$ 5,179
Beginning balance (in shares)	8,255,614	8,255,614
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 5,179	$ 5,179
Ending balance (in shares)	8,255,614	8,255,614
Series B Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 10,827	$ 10,827
Beginning balance (in shares)	18,894,315	18,894,315
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 10,827	$ 10,827
Ending balance (in shares)	18,894,315	18,894,315
Series C Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 24,908	$ 24,908
Beginning balance (in shares)	42,890,840	42,890,840
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 24,908	$ 24,908
Ending balance (in shares)	42,890,840	42,890,840
Series D Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 33,411	$ 33,411
Beginning balance (in shares)	39,656,811	39,656,811
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 33,411	$ 33,411
Ending balance (in shares)	39,656,811	39,656,811
Series E Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 29,738	$ 29,738
Beginning balance (in shares)	29,019,153	29,019,153
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 29,738	$ 29,738
Ending balance (in shares)	29,019,153	29,019,153
Series F Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 132,975	$ 132,975
Beginning balance (in shares)	74,840,147	74,840,147
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 132,975	$ 132,975
Ending balance (in shares)	74,840,147	74,840,147
Series F-1 Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 49,392	$ 49,392
Beginning balance (in shares)	23,664,027	23,664,027
Issuance of Series G preferred stock, net	$ 0	$ 0
Issuance of Series G preferred stock, net (in shares)	0	0
Ending balance	$ 49,392	$ 49,392
Ending balance (in shares)	23,664,027	23,664,027
Series G Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance	$ 39,207	$ 31,258
Beginning balance (in shares)	43,820,509	34,972,704
Issuance of Series G preferred stock, net	$ 43,547	$ 51,496
Issuance of Series G preferred stock, net (in shares)	48,220,533	57,068,338
Ending balance	$ 82,754	$ 82,754
Ending balance (in shares)	92,041,042	92,041,042