Quarterly report pursuant to Section 13 or 15(d)

Warrants (Details)

v3.19.2
Warrants (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Class of Warrant or Right [Line Items]      
Class of Warrant or Right, Outstanding 7,034,120 7,034,120 7,136,078
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.57 $ 2.57 $ 2.62
Convertible Preferred Stock Maximum Beneficial Ownership Percentage   9.99%  
Warrant [Member]      
Class of Warrant or Right [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Expirations 94,056 101,958