FAIR VALUE MEASUREMENTS - Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended
Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 3,500
Balance at end of period	3,540	$ 3,540
Recurring \| Total warranty obligations measured at fair value
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period		28,736	$ 19,806
Accruals for warranties issued during period		3,894	1,524
Changes in estimates		2,583	615
Settlements		(1,915)	(1,993)
Increase due to accretion expense		943	774
Other		(922)	(301)
Balance at end of period	$ 33,319	$ 33,319	$ 20,425

FAIR VALUE MEASUREMENTS - Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($)
$ in Thousands

2 Months Ended

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]

Balance at beginning of period

$ 3,500

Balance at end of period

3,540

$ 3,540

Recurring | Total warranty obligations measured at fair value

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]