Annual report pursuant to Section 13 and 15(d)

Property and Equipment (Narrative) (Details)

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Property and Equipment (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Property and equipment $ 3,871,035 $ 4,124,028  
Accumulated amortization 1,943,427 1,614,320  
Depreciation and amortization of property and equipment 562,468 487,906 $ 400,304
Assets Held under Capital Leases [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment 9,000 9,000  
Accumulated amortization $ 7,000 $ 5,000