Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue Recognition (Details)

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Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Proceeds from insurance settlement, operating activities $ 524,997  
Accounts receivable, net 20,602,962 $ 17,797,852
Unbilled Revenues    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, net 2,732,993 3,414,853
Accounts receivable, related parties $ 10,506,958 $ 7,459,988