SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 12, 2023	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Apr. 30, 2023	Apr. 11, 2023	Jun. 30, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents		$ 256,330	$ 256,330	$ 464,715	$ 226,673
Cash equivalent		33,800	33,800	29,800
Restricted cash		26,300	26,300	29,300
Derivative liability				8,871
Accrued returns		2,600	2,600	700
Warranties issued in period - recall campaign			62,900	65,800
Incurred recall campaign cost			22,000	3,000
Warranty liability, current		47,776	47,776	65,703
Warranty liability, noncurrent		29,500	$ 29,500	13,200
Minimum
Restricted Cash and Cash Equivalents Items [Line Items]
Warranty period			2 years
Maximum
Restricted Cash and Cash Equivalents Items [Line Items]
Warranty period			5 years
June 2022 Toggle Convertible Notes | Convertible Notes Payable
Restricted Cash and Cash Equivalents Items [Line Items]
Principal amount		130,269	$ 130,269	123,478		$ 100,000	$ 100,000	$ 200,000
Interest rate, stated percentage								8.00%
Paid-in-kind interest rate								11.00%
April 2023 Toggle Convertible Notes | Convertible Notes Payable
Restricted Cash and Cash Equivalents Items [Line Items]
Principal amount							$ 100,000
Interest rate, stated percentage							8.00%
Paid-in-kind interest rate							11.00%
Derivative liability							$ 21,200
8.25% Convertible Notes | Convertible Notes Payable
Restricted Cash and Cash Equivalents Items [Line Items]
Principal amount	$ 100,000	$ 2,008	$ 2,008	$ 21,558
Interest rate, stated percentage	8.25%	8.25%	8.25%	8.25%
Number of shares issued in debt conversion (in shares)	175,000,000	444,444	724,074	5,683,038
Embedded conversion feature	$ 47,300