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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 31, 2019
Dec. 31, 2017
Summary of Significant Accounting Policies        
Deferred offering costs       $ 461
Underwriting discounts and commissions   $ 4,200    
Other offering expenses   $ 1,237    
Anti-dilutive securities (in shares) 3,009,386 2,588,729    
Right to Use Asset $ 1,193      
Lease liability $ 1,193      
ASU 2016-02 | Adjustment        
Summary of Significant Accounting Policies        
Right to Use Asset     $ 1,308  
Lease liability     $ 1,308  
Computers and related equipment and furniture        
Summary of Significant Accounting Policies        
Useful life 5 years