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Commitments and Contingencies - Additional Information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Oct. 03, 2017
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Commitments and Contingencies          
Operating lease beginning period     2017-10    
Operating lease expiration period     2020-10    
Lessee, operating lease, discount rate     8.00%    
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    
Termination fee   $ 270,000      
Rent expenses     $ 212,000 $ 212,000 $ 470,000
Commission paid       450,000  
Commissions expense       $ 250,000  
M West Propco - Old Lessor          
Commitments and Contingencies          
Termination fee $ 250,000