CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Allowance for doubtful accounts trade receivable | $ 0 | $ 25 |
| Preferred Stock, par value | $ 0.001 | $ 0.001 |
| Preferred Stock, shares authorized | 5,000,000 | 5,000,000 |
| Preferred Stock, shares issued | 0 | 0 |
| Preferred Stock, shares outstanding | 0 | 0 |
| Common Stock, par value | $ 0.001 | $ 0.001 |
| Common Stock, shares authorized | 60,000,000 | 60,000,000 |
| Common Stock, shares issued | 23,595,160 | 23,595,160 |
| Common Stock, shares outstanding | 21,273,500 | 20,529,933 |
| Treasury stock, shares | 2,321,660 | 3,065,227 |