| Summary of intangible assets | 
        
   
   
   
   
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   December 31, 2011 | 
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   December 31, 2010 | 
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   Weighted Average Useful Lives | 
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   Gross Carrying Value | 
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   Accumulated Amortization | 
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   Net Carrying Value | 
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   Gross Carrying Value | 
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   Accumulated Amortization | 
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   Net Carrying Value | 
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   | 
    Indefinite life intangible assets: 
    | 
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    FCC licenses 
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   Indefinite | 
     | 
     | 
   $ | 
   2,083,654 | 
     | 
     | 
   $ | 
   — | 
     | 
     | 
   $ | 
   2,083,654 | 
     | 
     | 
   $ | 
   2,083,654 | 
     | 
     | 
   $ | 
   — | 
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   $ | 
   2,083,654 | 
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    Trademark 
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   Indefinite | 
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   250,000 | 
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   — | 
     | 
     | 
     | 
   250,000 | 
     | 
     | 
     | 
   250,000 | 
     | 
     | 
     | 
   — | 
     | 
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   250,000 | 
     | 
    
   
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    Definite life intangible assets: 
    | 
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    Subscriber relationships 
    | 
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   9 years | 
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   380,000 | 
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   (191,201 | 
   )  | 
     | 
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   188,799 | 
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   380,000 | 
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   (144,325 | 
   )  | 
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   235,675 | 
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    Licensing agreements 
    | 
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   9.1 years | 
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   78,897 | 
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   (34,145 | 
   )  | 
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   44,752 | 
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   78,897 | 
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   (24,130 | 
   )  | 
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   54,767 | 
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    Proprietary software 
    | 
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   6 years | 
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   16,552 | 
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   (11,507 | 
   )  | 
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   5,045 | 
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   16,552 | 
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   (9,566 | 
   )  | 
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   6,986 | 
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    Developed technology 
    | 
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   10 years | 
     | 
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   2,000 | 
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   (683 | 
   )  | 
     | 
     | 
   1,317 | 
     | 
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     | 
   2,000 | 
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   (483 | 
   )  | 
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   1,517 | 
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    Leasehold interests 
    | 
     | 
     | 
   7.4 years | 
     | 
     | 
     | 
   132 | 
     | 
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   (61 | 
   )  | 
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     | 
   71 | 
     | 
     | 
     | 
   132 | 
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   (43 | 
   )  | 
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     | 
   89 | 
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    Total intangible assets 
    | 
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   $ | 
   2,811,235 | 
     | 
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   $ | 
   (237,597 | 
   )  | 
     | 
   $ | 
   2,573,638 | 
     | 
     | 
   $ | 
   2,811,235 | 
     | 
     | 
   $ | 
   (178,547 | 
   )  | 
     | 
   $ | 
   2,632,688 | 
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        | Expected amortization expense for each of the fiscal years | 
        
   
   
   
   
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   | 
    Year ending December 31, 
    | 
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   Amount | 
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    2012 
    | 
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   $ | 
   53,680 | 
     | 
    
   
   | 
    2013 
    | 
     | 
     | 
   47,357 | 
     | 
    
   
   | 
    2014 
    | 
     | 
     | 
   38,879 | 
     | 
    
   
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    2015 
    | 
     | 
     | 
   37,553 | 
     | 
    
   
   | 
    2016 
    | 
     | 
     | 
   31,959 | 
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   | 
    Thereafter 
    | 
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     | 
   30,556 | 
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    Total definite life intangibles assets, net 
    | 
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   $ | 
   239,984 | 
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