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Selling Arrangement (Details) (USD $)
9 Months Ended 1 Months Ended 3 Months Ended
Sep. 30, 2014
Feb. 28, 2011
Selling Agreement
Sep. 30, 2014
Selling Agreement
Sep. 30, 2013
Selling Agreement
Selling Arrangement        
Payment for arrangement to sell signs   $ 4,000,000    
Term of arrangement   10 years    
Amortization expense 300,000   100,000 100,000
2014     400,000  
2015     400,000  
2016     400,000  
2017     400,000  
2018     $ 400,000