CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (Parentheticals) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Share issuance costs | $ 7,778 | $ 16,900 | $ 16,900 | |
| Series F put option liability | $ 103,364 | |||
| Series F Preferred Stock | ||||
| Share issuance costs | 118,855 | |||
| Conversion of preferred stock price per share | $ 0.10 | $ 0.10 | ||
| Series D Preferred Stock | ||||
| Share issuance costs | $ 183,343 | |||
| Conversion of preferred stock price per share | 0.10 | 0.10 | $ 0.25 | |
| Redeemable Convertible Series B Preferred Stock | ||||
| Conversion of preferred stock price per share | 0.10 | 0.10 | 0.25 | |
| Conversion liability into common stock per share | $ 0.001 | $ 0.001 | 0.15 | |
| Series C Preferred Stock | ||||
| Conversion of preferred stock price per share | $ 0.25 | |||