Quarterly report pursuant to Section 13 or 15(d)

Warrants - Schedule of Warrants Issued and Outstanding (Details)

v3.19.2
Warrants - Schedule of Warrants Issued and Outstanding (Details)
 3 Months Ended
Mar. 31, 2019
$ / shares
shares
Class Of Warrant Or Right [Line Items]  
Number of warrant shares 156,294
Issuance Date, November 2012 Tranche One  
Class Of Warrant Or Right [Line Items]  
Exercise price | $ / shares $ 6.00
Number of warrant shares 7
Year of expiration 2028
Issuance Date, November 2012 Tranche Two  
Class Of Warrant Or Right [Line Items]  
Exercise price | $ / shares $ 6.00
Number of warrant shares 927
Year of expiration 2020
Issuance Date, November 2012 Tranche Three  
Class Of Warrant Or Right [Line Items]  
Exercise price | $ / shares $ 14.50
Number of warrant shares 22
Year of expiration 2028
Issuance Date, August 2016  
Class Of Warrant Or Right [Line Items]  
Exercise price | $ / shares $ 0.15
Number of warrant shares 155,338
Year of expiration 2023