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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) (USD $) |  |  | 0 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Mar. 21, 2013 Subsequent Events One-for-Three Reverse Share Split
Ordinary share, par value (in dollars per share) | $ 0.00375 | $ 0.00375 | $ 0.00375
Ordinary share, authorized shares | 250,000,000 | 250,000,000 | 250,000,000
Reverse share split ratio |  |  | 0.33

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