Quarterly report pursuant to Section 13 or 15(d)

COMMON AND PREFERRED STOCK - Additional Information (Details)

v3.8.0.1
COMMON AND PREFERRED STOCK - Additional Information (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 16, 2018
USD ($)
shares
Apr. 10, 2018
shares
Jan. 31, 2018
USD ($)
$ / shares
Jun. 30, 2018
shares
Apr. 30, 2018
USD ($)
$ / shares
shares
Jan. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
class
$ / shares
shares
Mar. 31, 2017
shares
Dec. 31, 2017
$ / shares
shares
May 31, 2011
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Total shares of preferred and common stock authorized for issuance (in shares)             147,500,000      
Number of classes of shares | class             2      
Common stock, shares authorized (in shares)             142,500,000   142,500,000  
Common stock, par value (in dollars per share) | $ / shares             $ 0.001   $ 0.001  
Preferred stock, shares authorized (in shares)             5,000,000   5,000,000  
Preferred stock, par value (in dollars per share) | $ / shares             $ 0.001   $ 0.001  
Stock Activity [Abstract]                    
Common stock surrendered by certain employees to cover tax obligations (in shares)             100,000      
Fair value of common stock surrendered by certain employees to cover tax obligations | $             $ 200,000      
Shares forfeited (in shares)             89,601   270,510  
Exchange Transaction [Abstract]                    
Sale of stock, subscription arrangement amount, maximum | $     $ 40,000,000.0       $ 52,000,000.0      
Sale of stock, subscription arrangement, price per share | $ / shares     $ 3.00              
Stock Repurchase Program [Abstract]                    
Stock repurchase program, amount approved | $                   $ 150,000,000
Stock repurchased during period (in shares)             0 0    
Chief Executive Officer                    
Stock Activity [Abstract]                    
Shares forfeited (in shares)           900,000        
Total amount of share-based compensation expense that was reversed in connection with the termination | $           $ 1,200,000        
Subsequent Event                    
Exchange Transaction [Abstract]                    
Sale of stock, number of shares issued in transaction 3,592,684 58,666,667     62,300,000.0          
Proceeds from issuance of common stock | $ $ 93,400,000       $ 93,400,000          
Sale of stock, subscription arrangement, price per share | $ / shares         $ 1.50          
Debt instrument, convertible, conversion ratio adjustment threshold, minimum raised equity, additional shares required to be issued         103,200,000          
Sale of stock, number of additional shares authorized for purchase   8,800,000     34,700,000          
Exchange Agreement                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common stock, par value (in dollars per share) | $ / shares     $ 0.001     $ 0.001        
Exchange Agreement | Common Stock                    
Exchange Transaction [Abstract]                    
Debt conversion, converted instrument, amount | $     $ 155,000,000              
Other Supporting Noteholders | Exchange Agreement | Common Stock                    
Exchange Transaction [Abstract]                    
Debt instrument, convertible, conversion ratio adjustment threshold, minimum raised equity | $     $ 140,000,000              
Salt Creek Oil and Gas, LLC | Scenario, Forecast                    
Acquisition Agreement [Abstract]                    
Business acquisition, equity interest issued or issuable, number of shares (in shares)       6,000,000