Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS - Additional information (Details)

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FAIR VALUE MEASUREMENTS - Additional information (Details) - USD ($)
3 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Sep. 17, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Number of common stock in each unit     1
Public Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Number of redeemable warrant in each unit     0.33
Price per warrant     $ 1.46
Aggregate value   $ 14,400,000 $ 7,300,000
Transfer out of Level 3 $ 11,000,000    
Private Placement Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Price per warrant     $ 1.20
Aggregate value   $ 22,400,000 $ 11,000,000