Quarterly report pursuant to Section 13 or 15(d)

Transportation and Distribution Revenue - Balance Sheet and Income Statement (Details)

v3.8.0.1
Transportation and Distribution Revenue - Balance Sheet and Income Statement (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Jan. 01, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Deferred Tax Asset $ 3,511,770   $ 3,102,493 $ 2,244,629
Unearned revenue 4,842,292   6,704,826 3,397,717
Additional paid-in capital 326,008,627   329,324,471 331,773,716
Transportation and distribution revenue 3,952,979 $ 5,010,590    
Deferred tax benefit (409,277) $ (298,846)    
Balances Without Adoption of ASC 606 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Deferred Tax Asset       2,244,629
Unearned revenue       3,397,717
Additional paid-in capital       $ 331,773,716
Balances Without Adoption of ASC 606 [Member] | ASU 2014-09 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Deferred Tax Asset 2,396,547      
Unearned revenue 543,050      
Additional paid-in capital 329,192,646      
Transportation and distribution revenue 4,945,112      
Deferred tax benefit (151,918)      
Effect of Change Higher/(Lower) [Member] | ASU 2014-09 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Deferred Tax Asset 1,115,223   857,864  
Unearned revenue 4,299,242   3,307,109  
Additional paid-in capital (3,184,019)   $ (2,449,245)  
Transportation and distribution revenue (992,133)      
Deferred tax benefit $ (257,359)