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Leases - Schedule of Operating Lease Right-of-use Assets and Liabilities (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Leases [Abstract]    
Operating lease right-of-use assets, Beginning $ 2,101  
Amortization of operating lease right-of-use assets (146) $ (144)
Addition of operating lease right-of -use asset 28  
Write-off of right-of-use asset related to asset sale (26)  
Write-off of right-of-use asset due to lease termination (1,913)  
Operating lease right-of-use assets, Ending 44  
Operating lease liabilities, Beginning 3,300  
Principal payments on operating lease liabilities (120)  
Addition of operating lease liability 28  
Write-off of lease liability related to January 2020 asset sale (27)  
Write-off of lease liability related to lease termination (3,135)  
Operating lease liabilities, Ending 46  
Less non-current portion (18)  
Current portion $ 28