Quarterly report pursuant to Section 13 or 15(d)

Amortizable intangible assets -Estimated future annual amortization expense related to intangible assets (Details)

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Amortizable intangible assets -Estimated future annual amortization expense related to intangible assets (Details) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months $ 24,581  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 111,945  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 111,945  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 111,945  
Finite-Lived Intangible Assets, Amortization Expense, Year Five 111,945  
Amortization of Intangible Assets 432,244  
Intangible assets, net $ 904,605 $ 372,020