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Related Party Activities - Additional Information (Details)
3 Months Ended 5 Months Ended 9 Months Ended
Jan. 03, 2017
USD ($)
Aug. 02, 2016
USD ($)
$ / shares
shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2016
USD ($)
Dec. 22, 2016
USD ($)
shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
shares
Oct. 26, 2016
Director
Related Party Transaction [Line Items]                    
Registration rights agreement description           the Company entered into a Registration Rights Agreement with EF Realisation, pursuant to which the Company agreed to register for resale Class A voting common stock indirectly owned by EF Realisation. The Company agreed to file a registration statement providing for the resale of Class A voting common stock held by EF Realisation no later than the earlier of (i) October 26, 2017, and (ii) 30 days after the date the Company first becomes eligible to file a registration statement on Form S-3. The Form S-3 registration statement was filed with the Securities and Exchange Commission on November 7, 2017. The Company has also granted EF Realisation certain piggyback and demand registration rights.        
Class A Voting Common Stock                    
Related Party Transaction [Line Items]                    
Warrants to purchase common stock | shares     760,000     760,000        
Second Lien Notes                    
Related Party Transaction [Line Items]                    
Debt instrument face amount     $ 38,000,000     $ 38,000,000        
Repayment of principal second lien notes               $ 17,000,000 $ 21,000,000  
Securities Purchase Agreement | 12% Senior Secured Second Lien Notes Due 2021                    
Related Party Transaction [Line Items]                    
Debt instrument interest rate   12.00%                
Common stock price per share | $ / shares   $ 5.00                
Securities Purchase Agreement | 12% Senior Secured Second Lien Notes Due 2021 | Maximum                    
Related Party Transaction [Line Items]                    
Debt instrument face amount   $ 49,900,000                
Number of common shares issued | shares   998,000                
Leucadia                    
Related Party Transaction [Line Items]                    
Offering fee recorded as reduction to additional paid-in capital $ 1,000,000                  
Leucadia | Class A Voting Common Stock                    
Related Party Transaction [Line Items]                    
Number of common shares issued | shares         3,478,261          
Common shares issued, Value         $ 20,000,000          
Leucadia | Maximum | Class A Voting Common Stock                    
Related Party Transaction [Line Items]                    
Minimum ownership percentage required to appoint board of directors     50.00%     50.00%        
Leucadia | Securities Purchase Agreement | 12% Senior Secured Second Lien Notes Due 2021                    
Related Party Transaction [Line Items]                    
Debt instrument interest rate   12.00%                
Common stock price per share | $ / shares   $ 5.00                
Leucadia | Securities Purchase Agreement | 12% Senior Secured Second Lien Notes Due 2021 | Maximum                    
Related Party Transaction [Line Items]                    
Debt instrument face amount   $ 49,900,000                
Warrants to purchase common stock | shares   998,000                
Juneau Energy, LLC | Securities Purchase Agreement                    
Related Party Transaction [Line Items]                    
Warrants to purchase common stock | shares                 500,000  
Juneau Energy, LLC | Securities Purchase Agreement | 12% Senior Secured Second Lien Notes Due 2021                    
Related Party Transaction [Line Items]                    
Sale of stock, description of transaction           (i) up to $49.9 million aggregate principal amount of LRAI’s 12% senior secured second lien notes due 2021 (“Second Lien Notes”) and (ii) five-year warrants to purchase up to an aggregate 998,000 shares of the Company’s Class A voting common stock at a price equal to $5.00 per share (the “Warrants”). During 2016, LRAI issued $25 million in aggregate principal amount of Second Lien Notes and the Company issued Warrants to purchase 500,000 shares of its Class A voting common stock to Juneau. In December 2016, LRAI repaid to Juneau $21 million principal of the Second Lien Notes with proceeds from the 2016 Common Stock Offering.        
Juneau Energy, LLC | Securities Purchase Agreement | Second Lien Notes                    
Related Party Transaction [Line Items]                    
Debt instrument face amount                 $ 25,000,000  
Repayment of principal second lien notes                 $ 21,000,000  
EF Realisation | Class A Voting Common Stock | Board Representation Agreement                    
Related Party Transaction [Line Items]                    
Minimum ownership percentage on common stock issued and outstanding required for nominating two directors                   15.00%
Minimum ownership percentage on common stock issued and outstanding required for nominating one director                   10.00%
EF Realisation | Maximum | Class A Voting Common Stock                    
Related Party Transaction [Line Items]                    
Number of directors to be nominated | Director                   2
EF Realisation | Minimum | Class A Voting Common Stock                    
Related Party Transaction [Line Items]                    
Number of directors to be nominated | Director                   1
Butterfly Flaps, Ltd                    
Related Party Transaction [Line Items]                    
Cost of consultancy services           $ 25,000        
New Tech Global Ventures, LLC                    
Related Party Transaction [Line Items]                    
Cost of consultancy services     $ 198,000 $ 78,000   $ 664,000 $ 465,000