Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Detail)

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Commitments and Contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Detail)
Dec. 31, 2017
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2018 $ 640,202
2019 457,585
Total $ 1,097,787