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Property and Equipment (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Summary of property and equipment    
Property and equipment, gross $ 41,521,737 $ 42,070,396
Less accumulated depreciation and amortization (22,454,856) (22,309,279)
Property and equipment, net 19,066,881 19,761,117
Land, buildings and improvements [Member]
   
Summary of property and equipment    
Property and equipment, gross 16,391,268 16,853,353
Land, buildings and improvements [Member] | Minimum [Member]
   
Summary of property and equipment    
Estimated useful lives (years) 15 years  
Land, buildings and improvements [Member] | Maximum [Member]
   
Summary of property and equipment    
Estimated useful lives (years) 30 years  
Broadcast equipment [Member]
   
Summary of property and equipment    
Property and equipment, gross 19,774,373 19,675,408
Broadcast equipment [Member] | Minimum [Member]
   
Summary of property and equipment    
Estimated useful lives (years) 5 years  
Broadcast equipment [Member] | Maximum [Member]
   
Summary of property and equipment    
Estimated useful lives (years) 15 years  
Transportation equipment [Member]
   
Summary of property and equipment    
Property and equipment, gross 1,904,243 1,813,494
Estimated useful lives (years) 5 years  
Office equipment [Member]
   
Summary of property and equipment    
Property and equipment, gross 2,764,327 2,904,201
Office equipment [Member] | Minimum [Member]
   
Summary of property and equipment    
Estimated useful lives (years) 5 years  
Office equipment [Member] | Maximum [Member]
   
Summary of property and equipment    
Estimated useful lives (years) 10 years  
Construction in progress [Member]
   
Summary of property and equipment    
Property and equipment, gross $ 687,526 $ 823,940