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STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Feb. 27, 2018
Mar. 23, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
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            
Stock Options                
Weighted Average Fair Value                
Stock options outstanding - nonvested and exercisable     255,608 133,000 255,608 133,000    
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                
Stock options                
Vesting percentage of awards 33.33%              
Vesting period 3 years              
Unrecognized compensation cost                
Unamortized compensation cost     $ 929   $ 929      
Future amortization of stock based compensation                
Remainder of 2018     394   394      
2019     392   392      
2020     127   127      
2021     $ 16   $ 16      
Number of Options                
Outstanding at beginning of period (in shares)         88,667      
Granted (in shares) 122,608       122,608      
Outstanding at end of period (in shares)     211,275   211,275      
Weighted Average Exercise Price                
Outstanding at beginning of period (in dollars per share)         $ 11.13      
Granted (in dollars per share) $ 13.69       13.69      
Outstanding at end of period (in dollars per share)     $ 12.62   12.62      
Weighted Average Fair Value                
Outstanding at beginning of period (in dollars per share)         6.41      
Granted (in dollars per share) $ 7.55       7.55      
Outstanding at end of period (in dollars per share)     7.07   7.07      
Weighted Average Exercise Price Of Outstanding Options     $ 12.36   $ 12.36      
Options Outstanding, Weighted Average Remaining Contractual Life         5 years 3 months 7 days      
Options Exercisable, Number of options     44,333   44,333      
Options Exercisable, Weighted Average Exercise Price     $ 11.13   $ 11.13      
Options Exercisable, Weighted Average Remaining Contractual Life         4 years 8 months 23 days      
Aggregate fair value $ 926              
Stock options outstanding - nonvested and exercisable     255,608   255,608   133,000  
Assumptions and Methodology                
Weighted average volatility rate (as a percent) 71.94%              
Risk-free interest rate ( as a percent) 2.53%              
Dividend rate ( as a percent) 0.00%              
Expected life (in years) 4 years              
2015 EIP Plan | Stock Options | General and Administrative Expense                
Stock options                
Amortization expense     $ 214 $ 198 $ 337 $ 218    
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