STOCK BASED COMPENSATION - Stock Incentive Plans (Details) |
Dec. 31, 2016
shares
|
|---|---|
| 2015 Plan | Common Stock | |
| Stock-based compensation | |
| Number of shares reserved for issuance under the plan | 1,000,000 |
| 2007 Stock Incentive Plan | Stock options | |
| Stock-based compensation | |
| Share-based compensation arrangement by share-based payment award, future awards, shares | 0 |
| 2007 Stock Incentive Plan | Common Stock | |
| Stock-based compensation | |
| Number of shares reserved for issuance under the plan | 650,000 |