FAIR VALUE MEASUREMENTS - Reconciliation of derivative liabilities (Details)	3 Months Ended
	Dec. 31, 2020 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance of Public, Private Warrants	$ 33,919,120
Level 3 derivative liabilities End od period	40,532,280
Public Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance of Public, Private Warrants	19,458,000
Change in fair value	1,932,000
Private Placement Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance of Public, Private Warrants	10,415,200
Change in fair value	1,034,130
Forward Purchase Agreement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance of Public, Private Warrants	4,045,920
Change in fair value	$ 3,647,030