Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Legal Proceedings (Details)

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