Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash flows from operating activities:
Net loss	$ (12,225)	$ (74,609)	$ (76,173)	$ (139,702)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,121	1,356	6,161	1,875
Loss on extinguishment of debt		(63)		326
Gain on sale of property and equipment			(187)
Non-cash operating lease expense			4,184	757
Stock-based compensation expense	(5,353)	32,587	14,643	35,388
Changes in fair value of financial instruments carried at fair value, net			1,918	49,426
Amortization of debt discounts and debt issuance costs			137	48
Deferred income taxes			(95)	(3,571)
Changes in operating assets and liabilities:
Accounts receivable, net			605	399
Prepaid expenses and other current assets			1,308	(6,315)
Other assets			610	(671)
Accounts payable			13,575	1,488
Due to a related party			2,548	(525)
Accrued expenses and other current liabilities			8,442	14,972
Deferred revenue			(4,311)	1,634
Operating lease liabilities			(4,086)	(571)
Other liabilities			(21)	(33)
Cash flows used in operating activities			(30,742)	(45,075)
Cash flows from investing activities:
Purchase of property and equipment			(2,673)	(11,653)
Net cash received from Southern Acquisition				678
Internal-use software development costs			(1,792)	(148)
Net cash used in investing activities			(4,465)	(11,123)
Cash flows from financing activities:
Payments of borrowings on convertible notes				(40)
Principal payments on long-term debt			(2,331)	(586)
Proceeds from borrowings of SAFE notes				3,716
Proceeds from advances under Share Purchase Agreement			3,894	4,500
Proceeds from collateralized borrowings, net of repayment			2,847	(33)
Proceeds from borrowings on convertible notes				8,000
Proceeds from borrowings from related parties			29,662	16,477
Payments of borrowings from related parties				(114)
Proceeds from the issuance of Class B-6a redeemable convertible preferred shares				3,000
Proceeds from Issuance of Common Stock				25,000
Common stock repurchases for employee tax withholding				(1,273)
Proceeds from the exercise of ordinary warrants				3,175
Proceeds from the exercise of ordinary warrants				128
Proceeds from exercise of stock options			1	191
Payment of finance lease obligations			(175)	(30)
Net cash provided by financing activities			33,898	62,111
Increase (decrease) in cash, cash equivalents and restricted cash			(1,309)	5,913
Cash, cash equivalents and restricted cash at beginning of period			2,431	912	$ 912
Cash, cash equivalents and restricted cash at end of period	$ 1,122	$ 6,825	$ 1,122	$ 6,825	$ 2,431