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Property and Equipment (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 98,969 $ 88,802  
Accumulated depreciation 1,872,287   1,773,318
Capital lease assets, net 477,500   477,500
Leased equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Depreciation expense 14,700 14,700  
Accumulated depreciation 423,600   408,900
Capital leases [Member]
     
Property, Plant and Equipment [Line Items]      
Capital lease assets, net $ 53,900   $ 68,600