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Income Taxes - Schedule of Income (Loss) Before Income Taxes (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Expected (benefit) $ (2,186,550) $ (6,190,436) $ (9,908,804)
Effects of:      
State income taxes net of federal benefits (65,082) (184,257) (294,933)
Nondeductible expense (1,083,185) 1,854,717 (126,601)
Change in valuation allowance 4,189,828 4,900,061 10,469,108
Foreign Rate Differential $ (855,011) $ (380,085) (138,770)
Reversal of Prior Year AMT Accrual     (481,055)
Income tax provision (benefit)     $ (481,055)