Quarterly report pursuant to Section 13 or 15(d)

Leased Properties - Grand Isle Gathering System (Details)

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Leased Properties - Grand Isle Gathering System (Details)
3 Months Ended 6 Months Ended
Jun. 29, 2015
USD ($)
shares
Jun. 23, 2015
USD ($)
a
oil_field
well
tanks
mi
shares
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2014
USD ($)
Mar. 31, 2015
bbl
Dec. 31, 2014
shares
Sale Leaseback Transaction [Line Items]                
Shares of common stock offered | shares 12,937,500 12,937,500 59,611,472   59,611,472     46,605,055
Net offering proceeds on common stock $ 73,500,000 $ 73,500,000     $ 73,431,411 $ 45,624,563    
Net proceeds of convertible debt   $ 111,300,000     111,262,500 0    
Advances on revolving line of credit         45,072,666 2,535,671    
Asset acquisition costs     $ 416,591 $ 286,246 $ 1,658,546 $ 701,591    
Grand Isle Gathering System [Member]                
Sale Leaseback Transaction [Line Items]                
Length of offshore pipeline | mi   153            
Number of producing oil fields | oil_field   7            
Number of acres in the onshore terminal and saltwater disposal system | a   16            
Number of storage tanks | tanks   4            
Number of injection wells | well   3            
Volume of fluid GIGS transported | bbl             60,000  
Volume of oil GIGS transported | bbl             18,000  
Volume of water GIGS transported | bbl             42,000  
Total capacity GIGS can transport, volume | bbl             120,000  
Estimated useful lives of assets   30 years            
Grand Isle Corridor, LP [Member] | Grand Isle Gathering System [Member]                
Sale Leaseback Transaction [Line Items]                
Cash portion of consideration   $ 245,000,000            
Liabilities assumed in acquisition   12,200,000            
Asset acquisition costs   1,900,000            
Deferred leasing costs   298,000            
Total consideration   $ 259,300,000            
Energy XXI GIGS Services, LLC [Member] | Grand Isle Gathering System [Member]                
Sale Leaseback Transaction [Line Items]                
Number of producing oil fields | oil_field   6            
ExxonMobil [Member] | Grand Isle Gathering System [Member]                
Sale Leaseback Transaction [Line Items]                
Number of producing oil fields | oil_field   1            
Senior Credit Facility [Member]                
Sale Leaseback Transaction [Line Items]                
Advances on revolving line of credit $ 42,000,000 $ 42,000,000