Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Transportation and Distribution Revenue - Balance Sheet and Income Statement (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Deferred Tax Asset $ 4,948,203       $ 2,244,629       $ 4,948,203 $ 2,244,629   $ 3,102,493
Unearned revenue 6,552,049       3,397,717       6,552,049 3,397,717   6,704,826
Additional paid-in capital 320,295,969       331,773,716       320,295,969 331,773,716   329,324,471
Transportation and distribution revenue                 16,484,236      
Deferred tax benefit (81,725) $ (738,274) $ (604,064) $ (409,277) (352,018) $ 126,440 $ 38,084 $ (298,846) (1,833,340) (486,340) $ (151,313)  
Balances Without Adoption of ASC 606                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Deferred Tax Asset         2,244,629         2,244,629    
Unearned revenue         3,397,717         3,397,717    
Additional paid-in capital         $ 331,773,716         $ 331,773,716    
Balances Without Adoption of ASC 606 | ASU 2014-09                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Deferred Tax Asset 3,256,304               3,256,304      
Unearned revenue 29,695               29,695      
Additional paid-in capital 325,126,424               325,126,424      
Transportation and distribution revenue                 19,699,481      
Deferred tax benefit                 (999,305)      
Effect of Change Higher/(Lower) | ASU 2014-09                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Deferred Tax Asset 1,691,899               1,691,899     857,864
Unearned revenue 6,522,354               6,522,354     3,307,109
Additional paid-in capital $ (4,830,455)               (4,830,455)     $ (2,449,245)
Transportation and distribution revenue                 (3,215,245)      
Deferred tax benefit                 $ (834,035)