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Geographic Information - Long-lived assets based on physical location (Details 1) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 15,519,304 $ 16,161,476
United States
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets 12,261,233 11,561,840
Canada
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 3,258,071 $ 4,599,636