Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Restricted Stock Units (Details)

v3.19.3
Stockholders' Equity - Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Dec. 06, 2018
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Stockholders' Equity          
Offering price   $ 0.97   $ 0.97  
Shares underlying exercised       94,520  
Stock-based compensation   $ 768 $ 734 $ 2,315 $ 3,519
Restricted Stock Units          
Stockholders' Equity          
Number of shares granted 1,255,000     330,000  
Offering price $ 0.64        
Stock-based compensation       $ 300  
Restricted Stock Units | Vest on June 1, 2019          
Stockholders' Equity          
Vesting percentage 25.00%        
Restricted Stock Units | Vest on December 1, 2019          
Stockholders' Equity          
Vesting percentage 25.00%