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SUBSEQUENT EVENTS (Details)
Aug. 08, 2019
USD ($)
Aug. 07, 2019
Aug. 02, 2019
USD ($)
series
item
shares
Jul. 29, 2019
USD ($)
Sep. 07, 2017
Jun. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
SUBSEQUENT EVENTS              
Outstanding borrowings           $ 801,887,000 $ 613,105,000
Senior revolving credit facility              
SUBSEQUENT EVENTS              
Initial borrowing base           $ 225,000,000  
Applicable margin (as a percent)   2.00%          
Incremental borrowing under line of credit       $ 16,200,000      
Senior revolving credit facility | Minimum              
SUBSEQUENT EVENTS              
Current Ratio         1.00    
Subsequent events | Debtor-in-Possession Financing              
SUBSEQUENT EVENTS              
Available amount $ 35,000,000            
Amount available as interim draw 25,000,000            
Amount rolled over or converted into exit senior secured reserved-based credit facility $ 750,000,000            
Fee on undrawn amount (as a percent) 1.00%            
Subsequent events | Debtor-in-Possession Financing | LIBOR              
SUBSEQUENT EVENTS              
Applicable margin (as a percent) 5.50%            
Subsequent events | Debtor-in-Possession Financing | ABR - based              
SUBSEQUENT EVENTS              
Applicable margin (as a percent) 4.50%            
Subsequent events | Exit financing              
SUBSEQUENT EVENTS              
Amount rolled over or converted into exit senior secured reserved-based credit facility $ 750,000,000            
Initial borrowing base 275,000,000            
Amount available for issuance of letters of credit $ 50,000,000            
Maturity date 5 years            
Total Net Leverage Ratio 4.00            
Current Ratio 1.00            
Subsequent events | Minimum | Exit financing              
SUBSEQUENT EVENTS              
Fee on undrawn amount (as a percent) 0.375%            
Subsequent events | Minimum | Exit financing | LIBOR              
SUBSEQUENT EVENTS              
Applicable margin (as a percent) 2.00%            
Subsequent events | Minimum | Exit financing | ABR - based              
SUBSEQUENT EVENTS              
Applicable margin (as a percent) 1.00%            
Subsequent events | Maximum | Exit financing              
SUBSEQUENT EVENTS              
Fee on undrawn amount (as a percent) 0.50%            
Subsequent events | Maximum | Exit financing | LIBOR              
SUBSEQUENT EVENTS              
Applicable margin (as a percent) 3.00%            
Subsequent events | Maximum | Exit financing | ABR - based              
SUBSEQUENT EVENTS              
Applicable margin (as a percent) 2.00%            
Subsequent events | The Restructuring Support Agreement              
SUBSEQUENT EVENTS              
Pro rate share of common stock that unsecured noteholders will receive     91.00%        
Pro rate share of common stock that stockholders will receive     9.00%        
Aggregate price of new common shares offered to unsecured senior noteholders     $ 150,150,000        
Aggregate price of new common shares offered to existing common shareholders     $ 14,850,000        
Price per share discount (as a percent)     26.00%        
Assumed enterprise value     $ 425,000,000        
Consideration to unsecured senior noteholders for backstop senior noteholders rights offering (as a percent)     6.00%        
Cash payment percentage on termination of backstop agreement     6.00%        
Warrant term (in years)     3 years        
Number of series for warrants | series     3        
Number of distinct strike prices for warrants | item     3        
Percentage of each series of warrants issued to new shares     10.00%        
Percentage of cumulative warrants issued to new shares     30.00%        
Subsequent events | The Restructuring Support Agreement | Maximum              
SUBSEQUENT EVENTS              
Threshold shares of common stock holding by existing stockholders will receive cash | shares     2,000