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Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Prepaid Expenses and Other Current Assets    
Prepaid expenses $ 650,737 $ 199,195
Other receivables 41,107 268,659
Deposits 5,219 10,649
Prepaid expenses and other current assets $ 697,063 $ 478,503