CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Preferred stock, par | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 1,000,000 | 1,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Common stock, par | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 100,000,000 | 100,000,000 |
| Common stock, shares outstanding | 31,104,205 | 31,037,915 |
| Treasury shares, shares | 9,880,058 | 9,880,058 |