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Property and Equipment - Components of Property and Equipment (Detail) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Property plant and equipment Gross $ 2,098,807 $ 2,046,253
Less: accumulated depreciation (1,543,229) (1,400,768)
Property plant and equipment Net 555,578 645,485
Vehicles [Member]
    
Property, Plant and Equipment [Line Items]    
Property plant and equipment Gross 544,984 544,984
Computer equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Property plant and equipment Gross 727,648 790,987
Office furniture and fixtures [Member]
    
Property, Plant and Equipment [Line Items]    
Property plant and equipment Gross 329,210 239,662
Machinery and equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Property plant and equipment Gross 479,135 458,257
Leasehold improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property plant and equipment Gross $ 17,830 $ 12,363