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Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Prepaid Expenses and Other Current Assets    
Prepaid expenses $ 617,698 $ 393,857
Other receivables 58,758 38,683
Deposits 6,909 9,270
Prepaid expenses and other current assets $ 683,365 $ 441,810