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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 27, 2016
Sep. 30, 2016
Sep. 30, 2017
Dec. 31, 2016
Mar. 31, 2016
Aug. 31, 2015
Commitments And Contingencies [Line Items]            
Current portion of asset retirement obligations     $ 65 $ 78    
Non-current portion of asset retirement obligations     1,912 1,693    
Loss contingency accrual     118 105    
Asset retirement obligation:            
Total asset retirement obligations     $ 1,977 $ 1,771    
Key Management            
Commitments And Contingencies [Line Items]            
Usual length of consulting, employment and non-compete agreements     1 year      
Chief Executive Officer            
Commitments And Contingencies [Line Items]            
Restructuring Reserve         $ 747  
Range of possible loss, maximum           $ 2,000
Increase (Decrease) in Postemployment Obligations $ 1,800          
Legal Fees $ 700          
Postemployment Benefits, Period Expense   $ 0 $ 3,025