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Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
Jul. 31, 2017
Sep. 30, 2017
Mar. 31, 2017
Stockholders Equity Note [Line Items]      
Common stock, par value   $ 0.001  
Warrants issued   410,262  
Enterprise Value $ 1,050,000    
Maximum      
Stockholders Equity Note [Line Items]      
Enterprise Value 1,250,000    
Minimum      
Stockholders Equity Note [Line Items]      
Enterprise Value $ 850,000    
Predecessor      
Stockholders Equity Note [Line Items]      
Common stock, par value     $ 0.10
Reorganization Adjustments      
Stockholders Equity Note [Line Items]      
Shares issued 18,500,000    
Common stock, par value $ 0.001    
Reorganization Adjustments | Maximum      
Stockholders Equity Note [Line Items]      
Reserved shares of new common stock for issuance upon exercise 3,000,000    
Reorganization Adjustments | Common stock      
Stockholders Equity Note [Line Items]      
Per share value $ 25    
Reorganization Adjustments | Predecessor      
Stockholders Equity Note [Line Items]      
Shares issued 1,500,000    
Reorganization Adjustments | New Creditor Warrant      
Stockholders Equity Note [Line Items]      
Nominal exercise price of warrants $ 25    
Enterprise Value $ 288,600    
Reorganization Adjustments | New Creditor Warrant | Maximum      
Stockholders Equity Note [Line Items]      
Warrants exercisable period 25 years    
Reorganization Adjustments | New Creditor Warrant | Common stock      
Stockholders Equity Note [Line Items]      
Nominal exercise price of warrants $ 0.001    
Reorganization Adjustments | New Creditor Warrant | Common stock | Maximum      
Stockholders Equity Note [Line Items]      
Warrants issued 3,900,000    
Reorganization Adjustments | Series A      
Stockholders Equity Note [Line Items]      
Shares issued 2,400,000    
Warrants issued 2,400,000    
Nominal exercise price of warrants $ 2.27    
Enterprise Value $ 5,500    
Reorganization Adjustments | Series A | Maximum      
Stockholders Equity Note [Line Items]      
Warrants issued 2,400,000    
Warrants exercisable period 6 years    
Reorganization Adjustments | Series A | Predecessor      
Stockholders Equity Note [Line Items]      
Nominal exercise price of warrants $ 57.06    
Reorganization Adjustments | Series B      
Stockholders Equity Note [Line Items]      
Shares issued 2,600,000    
Warrants issued 2,600,000    
Nominal exercise price of warrants $ 1.88    
Enterprise Value $ 4,900    
Reorganization Adjustments | Series B | Maximum      
Stockholders Equity Note [Line Items]      
Warrants issued 2,600,000    
Reorganization Adjustments | Series B | Predecessor      
Stockholders Equity Note [Line Items]      
Nominal exercise price of warrants $ 62.28    
Reorganization Adjustments | General Unsecured Creditors      
Stockholders Equity Note [Line Items]      
Shares issued 17,000,000    
Reorganization Adjustments | General Unsecured Creditors | New Creditor Warrant      
Stockholders Equity Note [Line Items]      
Shares issued 7,700,000    
Reorganization Adjustments | Unresolved Sale Leaseback Claim | New Creditor Warrant      
Stockholders Equity Note [Line Items]      
Shares issued 3,900,000