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De-SPAC Merger Transaction - Other Information (Details) - USD ($)
 2 Months Ended 3 Months Ended 9 Months Ended
Aug. 26, 2022
Aug. 26, 2022
Sep. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
De-SPAC Merger Transaction                
Preferred dividends paid   $ 4,400,000   $ 4,380,000        
Common stock par value ( in dollars per share)           $ 0.01 $ 0.01  
Goodwill     $ 97,053,000 97,053,000   $ 97,053,000 $ 97,053,000 $ 14,616,000
Intangible assets $ 0 0 120,949,000 120,949,000   125,914,000 $ 132,339,000  
Transaction cost incurred capitalized 24,200,000 $ 24,200,000            
Transaction costs related to the issuance of shares 24,200,000              
Deferred transaction cost     $ 0 0   $ 0    
Payment of preferred equity issuance costs       1,250,000        
Net gain (loss) on extinguishment       $ (2,870,000)        
Common Stock                
De-SPAC Merger Transaction                
Issuance of common shares related to conversion of debt to equity (in units)     2,500,000   2,500,000      
Term Loan facility                
De-SPAC Merger Transaction                
Proceeds from line of credit 175,000,000.0              
Riverview                
De-SPAC Merger Transaction                
Number of shares issued, value $ 49,800,000              
Number of shares issued 12,868,151              
Number of shares issued for each unit 1 1            
Transaction cost incurred capitalized $ 17,100,000 $ 17,100,000            
Transaction cost incurred expenses 17,100,000              
Payment of preferred equity issuance costs 1,300,000              
Net gain (loss) on extinguishment (2,900,000)              
Riverview | Common Stock                
De-SPAC Merger Transaction                
Number of shares issued, value $ 34,855,535              
Number of shares issued for each unit 0.1049203474320 0.1049203474320            
Common stock par value ( in dollars per share) $ 0.01 $ 0.01            
Issuance of common shares related to conversion of debt to equity (in units) 2,220,305              
Riverview | Common Stock PIPE Commitments                
De-SPAC Merger Transaction                
Number of shares issued 1,910,000              
Series Redeemable Common Equivalent Preferred Units | Riverview                
De-SPAC Merger Transaction                
Number of shares issued for each unit 0.1086138208640 0.1086138208640            
Series B Redeemable Common Equivalent Preferred Units | Riverview                
De-SPAC Merger Transaction                
Number of shares issued for each unit 0.1049203474320 0.1049203474320            
Series A Redeemable Common Equivalent Preferred Shares | Riverview                
De-SPAC Merger Transaction                
Number of shares issued for each unit 0.1086138208740 0.1086138208740            
Number of new stock classified as temporary equity issued 23,587,952              
Series B Redeemable Common Equivalent Preferred Shares | Riverview                
De-SPAC Merger Transaction                
Number of shares issued for each unit 0.0919280171940 0.0919280171940            
Class A share | Riverview                
De-SPAC Merger Transaction                
Number of shares issued for each unit 1 1            
New Company | Riverview | Common Stock PIPE Commitments                
De-SPAC Merger Transaction                
Number of shares issued 20,590,000              
Amount received $ 205,900,000 $ 205,900,000            
New Company | Riverview | Wells Fargo | Senior secured first lien revolving credit facility                
De-SPAC Merger Transaction                
Face amount $ 175,000,000.0 $ 175,000,000.0