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14. Investment in Mutual Funds - Available-For-Sale (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
          Fair value measurement  
Description   December 31,     Quoted prices in active markets of identical assets (Level 1)     Significant  other observable inputs (Level 2)     Significant unobservable inputs  (Level 3)  
    US$     US$     US$     US$  
Investment in mutual funds - 2012     117,210       117,210              
Investment in mutual funds - 2011     111,116       111,116