Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Transportation and Distribution Revenue - Contract Assets and Liabilities (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 01, 2018
Jun. 30, 2018
Jun. 30, 2018
Change In Contract With Customer, Asset [Roll Forward]      
Beginning Balance $ 328,033   $ 328,033
Cumulative Transition Adjustment Upon Adoption of ASC 606     0
Unrecognized Performance Obligations     (418,314)
Recognized Performance Obligations     111,656
Ending Balance   $ 21,375 21,375
Change In Contract With Customer, Liability [Roll Forward]      
Beginning Balance 0   0
Cumulative Transition Adjustment Upon Adoption of ASC 606 $ 3,300,000   3,307,109
Unrecognized Performance Obligations   992,000 1,984,266
Recognized Performance Obligations     0
Ending Balance   $ 5,291,375 $ 5,291,375