FAIR VALUE MEASUREMENTS, Change in Level 3 Fair Value of Warrant Liabilities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2020
Unobservable Input Reconciliation [Roll Forward]
Change in fair value of warrant liabilities	$ 181,000	$ 181,000	$ (7,240,000)
Warrant Liabilities [Member]
Unobservable Input Reconciliation [Roll Forward]
Level 3 - Beginning balance		0	0
Initial measurement on September 17, 2020			16,290,000
Change in fair value of warrant liabilities			7,240,000
Level 3 - Ending balance			0
Warrant Liabilities [Member] | Level 2 [Member]
Unobservable Input Reconciliation [Roll Forward]
Transfer from Level 3			(8,580,000)
Warrant Liabilities [Member] | Level 1 [Member]
Unobservable Input Reconciliation [Roll Forward]
Transfer from Level 3			(14,950,000)
Warrant Liabilities [Member] | Private Placement Warrants [Member]
Unobservable Input Reconciliation [Roll Forward]
Level 3 - Beginning balance		0	0
Initial measurement on September 17, 2020			5,940,000
Change in fair value of warrant liabilities			2,640,000
Level 3 - Ending balance			0
Warrant Liabilities [Member] | Private Placement Warrants [Member] | Level 2 [Member]
Unobservable Input Reconciliation [Roll Forward]
Transfer from Level 3			(8,580,000)
Warrant Liabilities [Member] | Private Placement Warrants [Member] | Level 1 [Member]
Unobservable Input Reconciliation [Roll Forward]
Transfer from Level 3			0
Warrant Liabilities [Member] | Public Warrants [Member]
Unobservable Input Reconciliation [Roll Forward]
Level 3 - Beginning balance		$ 0	0
Initial measurement on September 17, 2020			10,350,000
Change in fair value of warrant liabilities			4,600,000
Level 3 - Ending balance			0
Warrant Liabilities [Member] | Public Warrants [Member] | Level 2 [Member]
Unobservable Input Reconciliation [Roll Forward]
Transfer from Level 3			0
Warrant Liabilities [Member] | Public Warrants [Member] | Level 1 [Member]
Unobservable Input Reconciliation [Roll Forward]
Transfer from Level 3			$ (14,950,000)