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Leases - Schedule of Operating Lease Right-of-use Assets and Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Operating lease right-of-use assets, Beginning $ 2,101  
Amortization of operating lease right-of-use assets (73) $ (72)
Write-off of right-of-use asset related to asset sale (Note 5) (26)  
Operating lease right-of-use assets, Ending 2,002  
Operating lease liabilities, Beginning 3,300  
Principal payments on operating lease liabilities (106)  
Write-off of lease liability related to asset sale (Note 5) (27)  
Operating lease liabilities, Ending 3,167  
Less non-current portion (2,782)  
Current portion at March 31, 2020 $ 385