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STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 23, 2017 | Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 26, 2015
Nonemployee Directors |  |  |  |  |
Stock options |  |  |  |  |
Maximum annual limit for grants (in shares) | 500,000 |  |  |  |
Other Individuals |  |  |  |  |
Stock options |  |  |  |  |
Maximum annual limit for grants (in shares) | 1,000,000 |  |  |  |
2015 EIP Plan |  |  |  |  |
Stock options |  |  |  |  |
Aggregate number of shares of common stock available for awards | 2,750,000 |  |  |  | 400,000
2015 EIP Plan | Stock Options |  |  |  |  |
Unrecognized compensation cost |  |  |  |  |
Unamortized compensation cost |  |  | $ 341 |  |
Future amortization of stock based compensation |  |  |  |  |
2018 |  |  | 254 |  |
2019 |  |  | $ 87 |  |
Number of Options |  |  |  |  |
Granted (in shares) |  | 133,000 |  |  |
Exercisable (in shares) |  | (44,333) |  |  |
Outstanding at end of period (in shares) |  | 88,667 |  |  |
Weighted Average Exercise Price |  |  |  |  |
Granted (in dollars per share) |  | $ 11.13 |  |  |
Exercisable (in dollars per share) |  | 11.13 |  |  |
Outstanding at end of period (in dollars per share) |  | 11.13 |  |  |
Weighted Average Fair Value |  |  |  |  |
Granted (in dollars per share) |  | 6.41 |  |  |
Exercisable (in dollars per share) |  | 6.41 |  |  |
Outstanding at end of period (in dollars per share) |  | $ 6.41 |  |  |
Options outstanding and unvested |  | 88,667 | 88,667 |  |
Options Outstanding, Weighted Average Remaining Contractual Life |  | 5 years 2 months 23 days |  |  |
Options Exercisable, Number of options |  |  | 44,333 |  |
Options Exercisable, Weighted Average Exercise Price |  |  | $ 11.13 |  |
Options Exercisable, Weighted Average Remaining Contractual Life |  | 5 years 2 months 23 days |  |  |
Stock options outstanding - nonvested and exercisable |  |  | 133,000 | 0 |
2015 EIP Plan | Stock Options | General and Administrative Expense |  |  |  |  |
Stock options |  |  |  |  |
Amortization expense |  | $ 512 |  |  |
2015 EIP Plan | Stock Options | John C. Wobensmith |  |  |  |  |
Stock options |  |  |  |  |
Vesting percentage of awards | 33.33% |  |  |  |
Vesting period | 3 years |  |  |  |
Number of Options |  |  |  |  |
Granted (in shares) | 133,000 |  |  |  |
Weighted Average Exercise Price |  |  |  |  |
Granted (in dollars per share) | $ 11.13 |  |  |  |
Weighted Average Fair Value |  |  |  |  |
Granted (in dollars per share) | $ 6.41 |  |  |  |
Aggregate fair value | $ 853 |  |  |  |
Assumptions and Methodology |  |  |  |  |
Weighted average volatility rate (as a percent) | 79.80% |  |  |  |
Risk-free interest rate ( as a percent) | 1.68% |  |  |  |
Dividend rate ( as a percent) | 0.00% |  |  |  |
Expected life (in years) | 3 years 9 months 11 days |  |  |  |

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