Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Contractual Commitment Under Operating Lease (Detail)

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Commitments and Contingencies - Contractual Commitment Under Operating Lease (Detail) (USD $)
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
2015 $ 176,190us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent