XML 52 R42.htm IDEA: XBRL DOCUMENT v3.19.2
Net Loss per Share - Anti-dilutive (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Anti-dilutive securities        
Anti-dilutive securities excluded from the calculation of net loss per share 2,911,838 2,494,157 2,911,838 2,494,157
Restricted common stock        
Anti-dilutive securities        
Anti-dilutive securities excluded from the calculation of net loss per share 480,663 1,003,222 480,663 1,003,222
Warrant        
Anti-dilutive securities        
Anti-dilutive securities excluded from the calculation of net loss per share 7,614 7,614 7,614 7,614
Stock options        
Anti-dilutive securities        
Anti-dilutive securities excluded from the calculation of net loss per share 2,423,561 1,483,321 2,423,561 1,483,321