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Related Party Transactions and Balances - Schedule of Amounts due from Related Parties (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Related Party Transaction [Line Items]    
Prepayment for leases of advertising space $ 40  
Advertising [Member]
   
Related Party Transaction [Line Items]    
Prepayment for leases of advertising space $ 40