Quarterly report pursuant to Section 13 or 15(d)

Transportation and Distribution Revenue - Contract Assets and Liabilities (Details)

v3.8.0.1
Transportation and Distribution Revenue - Contract Assets and Liabilities (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
Change In Contract With Customer, Asset [Roll Forward]  
Beginning Balance $ 328,033
Cumulative Transition Adjustment Upon Adoption of ASC 606 0
Unrecognized Performance Obligations (207,157)
Recognized Performance Obligations 31,272
Ending Balance 152,148
Change In Contract With Customer, Liability [Roll Forward]  
Beginning Balance 0
Cumulative Transition Adjustment Upon Adoption of ASC 606 3,307,109
Unrecognized Performance Obligations 992,133
Recognized Performance Obligations 0
Ending Balance $ 4,299,242