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PROPERTY AND EQUIPMENT, NET (Tables)
12 Months Ended
Dec. 31, 2012
PROPERTY AND EQUIPMENT, NET [Abstract]  
Property, Plant And Equipment
    As of December 31,  
    2011     2012  
Computer and transmission equipment   $ 10,246,858     $ 11,277,560  
Furniture and office equipment     812,019       824,806  
Motor vehicles     747,186       783,060  
Leasehold improvements     2,327,099       2,606,638  
Communication equipment     348,602       292,188  
Office building     683,077       684,305  
      15,164,841       16,468,557  
Less: accumulated depreciation     (11,544,562 )     (13,403,071 )
    $ 3,620,279     $ 3,065,486