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Leases - Future Maturities of Operating Lease Liabilities and Other Lease Information (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Lease Liability      
2021 $ 165    
2022 116    
2024 54    
Total lease payments 335    
Less: interest (3)    
Present value of lease liabilities 332   $ 517
Cash paid for amounts included in the measurement of lease liabilities:      
Operating cash flows from operating leases (cash payments) 92 $ 116  
Operating cash flows from operating leases (lease liability addition) 0 110  
Operating lease right-of-use assets obtained in exchange for leases entered into during the period $ 170 $ 196