Registration of securities issued in business combination transactions

RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (Parenthetical) (FY) (Details)

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RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (Parenthetical) (FY) (Details) - shares
3 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2020
Class A Common Stock | Common stock    
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Sale of Units, net of underwriting discounts and offering expenses 23,000,000 23,000,000