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U.S. Federal Tax Rate (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Effective Income Tax Rate [Line Items]    
Tax benefit computed at the federal statutory rate $ (8,466,361) $ (1,901,595)
State income tax (benefit), net of federal income tax effect (1,209,480) (271,656)
Nondeductible permanent differences 6,042,555 (468,568)
Change in valuation allowance 3,633,286 2,641,819
Provision for income taxes $ 0 $ 0