Quarterly report pursuant to Section 13 or 15(d)

Transportation and Distribution Revenue - Additional Information (Details)

v3.8.0.1
Transportation and Distribution Revenue - Additional Information (Details) - USD ($)
3 Months Ended 155 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Oct. 31, 2030
Concentration Risk [Line Items]      
Cumulative Transition Adjustment Upon Adoption of ASC 606 $ 3,307,109    
Unrecognized performance obligations 992,133    
Remaining performance obligation $ 67,500,000    
Natural Gas Transportation Contract [Member] | Product and services [Member] | Revenue [Member]      
Concentration Risk [Line Items]      
Concentration percentage 66.50% 71.80%  
Natural Gas Distribution Contract [Member] | Product and services [Member] | Revenue [Member]      
Concentration Risk [Line Items]      
Concentration percentage 26.40% 20.10%  
Forecast [Member]      
Concentration Risk [Line Items]      
Recognized performance obligations quarterly     $ 138,000