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Leases - Additional Information (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2019
Jan. 01, 2019
Leases [Abstract]    
Right-of-use lease asset $ 203 $ 400
Short-term lease liability $ 197 200
Long-term lease liability   $ 200
Interest rate 8.00%  
Operating leases expense $ 200  
Operating leases expiration period 2020-10  
Option to extend additional lease term 20 months 15 days  
Operating lease, option to extend option to extend the lease for an additional 20.5 month period