Consolidated Balance Sheets (Parenthetical) - $ / shares |
Mar. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|---|
| Statement of Financial Position [Abstract] | |||
| Common stock, par value | $ 0.0001 | $ 0.0001 | $ 0.0001 |
| Common stock, shares authorized | 300,000,000 | 300,000,000 | 300,000,000 |
| Common stock, shares issued | 27,656,121 | 23,640,621 | 9,182,470 |
| Common stock, shares outstanding | 27,656,121 | 23,640,621 | 9,182,470 |