Annual report pursuant to Section 13 and 15(d)

ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures - Narrative (Details)

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ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Revenue $ 138,148,842 $ 113,953,519
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Revenue $ (134,000)