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Lease Obligations - Future Minimum Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
2022 $ 233  
Total lease payments 233  
Less: imputed interest (4)  
Present value of lease liabilities 229  
Lease liabilities, current 229 $ 548
Lease liabilities 0 $ 233
Total lease liabilities $ 229  
Weighted-average remaining term (in years) 5 months 8 days  
Weighted-average discount rate 10.50%