Warrant derivative liability (Placement Agent Warrants) (Details) - USD ($) |
1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Nov. 13, 2017 |
Aug. 05, 2017 |
Apr. 05, 2017 |
Nov. 15, 2017 |
Apr. 17, 2017 |
Mar. 20, 2017 |
Dec. 31, 2017 |
|
| Warrants issued During Period | 34,783 | ||||||
| Class of Warrant or Right, Outstanding | 896,739 | 95,653 | |||||
| Shares issued for secondary offering, shares | 2,314,500 | 434,783 | 434,783 | 117,361 | |||
| Placement Agent Warrants [Member] | |||||||
| Warrants issued During Period | 34,783 | ||||||
| Percentage Of Shares Issue To Placement Agent | 8.00% | ||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 1.00 | ||||||
| Class of Warrant or Right, Outstanding | 95,653 | 95,653 | |||||
| Warrants Not Settleable in Cash, Fair Value Disclosure | $ 65 | ||||||
| Fair Value Adjustment of Warrants | $ 14 | ||||||