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Commitments and Contingencies - Legal Proceedings (Details)
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Feb. 11, 2021
USD ($)
Aug. 02, 2019
item
May 29, 2019
item
Feb. 28, 2019
item
Jan. 31, 2019
item
Nov. 30, 2018
item
Dec. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Aug. 02, 2021
USD ($)
Legal Proceedings                  
Estimated settlement liability             $ 9,000,000 $ 9,000,000  
Insurance recovery             9,000,000 9,000,000  
Class Actions In Eastern District Of Pennsylvania                  
Legal Proceedings                  
Number of claims | item         3 3      
Number of claims after consolidation | item         1        
Number of investors appointed | item     5            
Number of former officers | item   2              
Monetary payment to be made to the plaintiff $ 8,500,000                
Estimated settlement liability             8,500,000 8,500,000  
Insurance recovery             8,500,000 8,500,000  
Settlement amount paid by insurance carriers               8,500,000  
Shareholder Derivative Actions                  
Legal Proceedings                  
Number of claims | item       2          
Estimated settlement liability             500,000 $ 500,000  
Insurance recovery                 $ 500,000
Settlement amount paid by insurance carriers             $ 500,000