Quarterly report pursuant to Section 13 or 15(d)

Credit Facilities (Details)

v3.5.0.2
Credit Facilities (Details) - USD ($)
 6 Months Ended
Mar. 30, 2016
Dec. 20, 2012
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Line of Credit Facility [Line Items]          
Borrowed against the revolver     $ 44,000,000 $ 45,072,666  
Total Assets     659,109,143   $ 677,979,621
Pinedale Liquids Gathering System [Member]          
Line of Credit Facility [Line Items]          
Total Assets     140,800,000    
Key Bank [Member] | Secured Debt [Member]          
Line of Credit Facility [Line Items]          
Loan facility secured by assets   $ 70,000,000      
Maximum borrowing capacity   $ 70,000,000      
Basis spread on variable rate 1.00%        
Line of Credit Facility, Periodic Payment Through Extension Period, Principal     3,200,000    
Key Bank [Member] | Secured Debt [Member] | Pinedale Liquids Gathering System [Member]          
Line of Credit Facility [Line Items]          
Monthly principal periodic payment     $ 294,000    
Required principle payment as percentage of outstanding amount, beginning in year two     0.42%    
LIBOR [Member] | Key Bank [Member] | Secured Debt [Member]          
Line of Credit Facility [Line Items]          
Basis spread on variable rate   3.25% 4.25%    
Maximum [Member] | LIBOR [Member] | Key Bank [Member] | Secured Debt [Member]          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 7.00%        
Line of Credit [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Borrowed against the revolver $ 44,000,000        
Available borrowing capacity     $ 54,200,000    
Pinedale Liquids Gathering System [Member]          
Line of Credit Facility [Line Items]          
Non controlling economic interest pinedale GP 81.05%        
Value of economic interest $ 47,400,000        
Pinedale Liquids Gathering System [Member] | Key Bank [Member] | Secured Debt [Member]          
Line of Credit Facility [Line Items]          
Principal balance 58,500,000        
Cash Flow Hedging [Member]          
Line of Credit Facility [Line Items]          
Cash flow hedge terminated $ 26,300,000