Annual report pursuant to Section 13 and 15(d)

Accounts receivable, net (Details Textual)

v3.7.0.1
Accounts receivable, net (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Provision for Doubtful and Other Accounts $ 1,176,208 $ 949
Allowance for Doubtful Accounts Receivable, Write-offs $ 42,897 $ 403,735