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STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Feb. 27, 2018
Mar. 23, 2017
Dec. 31, 2018
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      
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     $ 535    
Future amortization of stock based compensation          
2019     392    
2020     127    
2021     $ 16    
Number of Options          
Outstanding at beginning of period (in shares)     88,667    
Granted (in shares) 122,608   122,608 133,000  
Exercisable (in shares)     (44,333) (44,333)  
Outstanding at end of period (in shares)     166,942 88,667  
Weighted Average Exercise Price          
Outstanding at beginning of period (in dollars per share)     $ 11.13    
Granted (in dollars per share) $ 13.69   13.69 $ 11.13  
Exercisable (in dollars per share)     11.13 11.13  
Outstanding at end of period (in dollars per share)     13.01 11.13  
Weighted Average Fair Value          
Outstanding at beginning of period (in dollars per share)     6.41    
Granted (in dollars per share) $ 7.55   7.55 6.41  
Exercisable (in dollars per share)     6.41 6.41  
Outstanding at end of period (in dollars per share)     7.25 $ 6.41  
Weighted Average Exercise Price Of Outstanding Options     $ 12.36    
Options Outstanding, Weighted Average Remaining Contractual Life     4 years 10 months 28 days    
Options Exercisable, Number of options     88,666    
Options Exercisable, Weighted Average Exercise Price     $ 11.13    
Options Exercisable, Weighted Average Remaining Contractual Life     4 years 2 months 23 days    
Aggregate fair value $ 926        
Stock options outstanding - nonvested and exercisable     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     $ 731 $ 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