Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Details)

v3.20.2
Leases - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
May 01, 2020
Dec. 31, 2019
Jan. 01, 2019
Lessee Lease Description [Line Items]              
Operating lease right-of-use assets $ 761   $ 761     $ 556  
Operating lease liability 808   808     $ 599  
Operating lease cost recognized $ 100 $ 100 $ 300 $ 300      
Newark, California              
Lessee Lease Description [Line Items]              
Operating lease, description     The Company leases its principal executive offices in Newark, California, under a non-cancelable operating lease that expires in October 2021.        
Operating lease, expiration period     2021-10        
Operating lease right-of-use assets             $ 900
Operating lease liability             $ 900
Operating lease, discount rate             6.00%
Washington, DC              
Lessee Lease Description [Line Items]              
Operating lease, description     the Company executed a lease agreement for office space in Washington, DC, under a non-cancelable operating lease that expires in November 2025.        
Operating lease, expiration period     2025-11        
Operating lease right-of-use assets         $ 500    
Operating lease liability         $ 500    
Operating lease, discount rate         3.85%    
Operating lease, option to extended lease term 5 years   5 years        
Operating Lease, existence of option to extend     true