Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.19.2
Commitments and Contingencies - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Operating Lease, Weighted Average Discount Rate, Percent 9.90% 9.90%  
Operating Lease, Cost $ 50,000 $ 101,000  
Operating Lease, Payments $ 75,000 149,000  
Non Cash Operating Lease Assets Acquired   $ 538,000 $ 0
Operating Lease Expiration Year   2022  
Accounting Standards Update 2016-02 [Member]      
Non Cash Operating Lease Assets Acquired   $ 538,000