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Leases - General Information (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
Sep. 01, 2021
USD ($)
ft²
Jun. 30, 2021
USD ($)
Mar. 19, 2021
USD ($)
Operating leases        
Operating lease right-of-use asset $ 3,826   $ 3,563  
Operating lease liabilities $ 3,842      
Office Space and Manufacturing Facilities, Grand Prairie, Texas        
Operating leases        
Operating lease right-of-use asset       $ 3,500
Operating lease liabilities       $ 3,500
Operating lease, borrowing rate (as a percent)       6.70%
Finance leases        
Finance leases, interest rate (as a percent)       5.90%
Office, Berwyn, Pennsylvania        
Operating leases        
Area leased | ft²   6,352    
Operating lease right-of-use asset   $ 500    
Operating lease liabilities   $ 500    
Operating lease, borrowing rate (as a percent)   6.25%