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Other Current Assets - Summary of Other Current Assets (Detail) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid expenses $ 650,157us-gaap_PrepaidExpenseCurrent $ 1,025,083us-gaap_PrepaidExpenseCurrent
Deposits 5,505us-gaap_DepositsAssetsCurrent 55,281us-gaap_DepositsAssetsCurrent
Total other current assets $ 655,662us-gaap_OtherAssetsCurrent $ 1,080,364us-gaap_OtherAssetsCurrent