Discontinued Operations - Schedule of Condensed Consolidated Balance Sheet from Discontinued Operations (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Inventory	$ 0	$ 163,250
Property and equipment, net	2,864	19,150
Other assets	152	14,137
Assets from discontinued operations	3,016	196,537	$ 432,242
LIABILITIES
Accounts payable	19	6,440
Accrued expenses	4,817	27,133
Vehicle floorplan	0	151,178
Deferred revenue	0	14,025
Operating lease liabilities	161	23,461
Other liabilities	0	5,883
Liabilities from discontinued operations	$ 4,997	$ 228,120	$ 383,823