Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Details)

v3.19.2
Leases - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jan. 01, 2019
Lessee Disclosure [Abstract]      
Operating lease, description   The Company leases its principal executive offices in Newark, California, under a non-cancelable operating lease which expires in October 2021.  
Operating lease, expiraton period   2021-10  
Operating lease right-of-use asset $ 697 $ 697 $ 900
Operating lease liability $ 753 $ 753 $ 900
Operating lease, discount rate 6.00% 6.00%  
Operating lease cost recognized $ 200 $ 100  
Rent expense $ 200 $ 100