SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) obligation	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Revenue, Major Customer [Line Items]
Number of performance obligations | obligation	2
Basic vehicle warranty term	4 years
Revenue	$ 149,432,000	$ 57,675,000
Vehicle Sales With RVG
Revenue, Major Customer [Line Items]
Revenue	18,700,000	$ 0
Vehicle Sales With OTA and Remarketing
Revenue, Major Customer [Line Items]
Deferred revenue	$ 18,500,000		$ 15,400,000