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RELATED PARTY TRANSACTIONS, Founder Shares (Details)
1 Months Ended 5 Months Ended 9 Months Ended
Nov. 21, 2019
shares
Oct. 31, 2019
shares
Aug. 31, 2019
USD ($)
shares
Dec. 31, 2019
shares
Sep. 30, 2021
$ / shares
shares
Dec. 31, 2020
shares
Founder Shares [Abstract]            
Stock conversion basis at time of business combination         1  
Founder Shares [Member] | Sponsor [Member] | Class A Common Stock [Member]            
Founder Shares [Abstract]            
Stock conversion basis at time of business combination         1  
Number of trading days         20 days  
Trading day threshold period         30 days  
Founder Shares [Member] | Sponsor [Member] | Class A Common Stock [Member] | Minimum [Member]            
Founder Shares [Abstract]            
Share price (in dollars per share) | $ / shares         $ 12.00  
Threshold period after initial Business Combination         150 days  
Founder Shares [Member] | Sponsor [Member] | Class B Common Stock [Member]            
Founder Shares [Abstract]            
Shares issued (in shares) 7,906,250   7,187,500      
Proceeds from issuance of stock | $     $ 25,000      
Stock dividend issued (in shares) 718,750          
Ownership interest, as converted percentage 20.00%          
Number of shares no longer subject to forfeiture (in shares) 625,000          
Number of shares forfeited (in shares)       406,250    
Number of shares outstanding (in shares)         7,500,000 7,500,000
Founder Shares [Member] | Sponsor [Member] | Class B Common Stock [Member] | Maximum [Member]            
Founder Shares [Abstract]            
Number of shares subject to forfeiture (in shares) 1,031,250          
Founder Shares [Member] | Director 1 [Member] | Class B Common Stock [Member]            
Founder Shares [Abstract]            
Shares issued (in shares)   25,000        
Founder Shares [Member] | Director 2 [Member] | Class B Common Stock [Member]            
Founder Shares [Abstract]            
Shares issued (in shares)   25,000        
Founder Shares [Member] | Director 3 [Member] | Class B Common Stock [Member]            
Founder Shares [Abstract]            
Shares issued (in shares)   25,000        
Founder Shares [Member] | Directors [Member] | Class B Common Stock [Member]            
Founder Shares [Abstract]            
Shares issued (in shares)   75,000