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 $)
Jun. 30, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months $ 29,450  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 94,640  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 94,640  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 94,640  
Finite-Lived Intangible Assets, Amortization Expense, Year Five 94,640  
Amortization of Intangible Assets 376,020  
Intangible assets, net $ 784,030 $ 372,020