CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] - $ / shares |
Jun. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Common stock, par value (in dollars per share) | $ 0.0005 | $ 0.0005 |
| Common stock, shares authorized | 150,000,000 | 150,000,000 |
| Common stock, shares outstanding | 54,385,411 | 54,385,411 |