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COMMON SHARES (Details) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2010 | Jan. 31, 2009 | Jan. 31, 2008 | Feb. 28, 2013 item | Feb. 29, 2012 | Feb. 28, 2011
Common shares |  |  |  |  |  |
Number of classes of common shares |  |  |  | 2 |  |
Net proceeds from IPO | $ 127.0 |  |  |  |  |
Class A Common shares |  |  |  |  |  |
Common shares |  |  |  |  |  |
Number of votes to which holders of common shares are entitled for each share held |  |  |  | 1 |  |
Number of Class A common shares into which each Class B common share is convertible |  |  |  | 1 |  |
Shares issued | 27,600,000 |  |  |  |  | 27,600,000
Common shares, par value (in dollars per share) |  |  |  | $ 0.001 | $ 0.001 |
Conversion of Class B common shares to Class A common shares (in shares) |  |  |  | 21,875,000 | 15,319,000 |
Common shares were cancelled upon the completion of the share repurchase |  |  |  | 577,938 |  |
Shares issued related to vesting and conversion of non-vested shares |  |  |  | 1,740,044 | 2,358,044 |
Class B Common shares |  |  |  |  |  |
Common shares |  |  |  |  |  |
Number of votes to which holders of common shares are entitled for each share held |  |  |  | 10 |  |
Shares issued |  | 119,999,000 | 1,000 |  |  |
Common shares, par value (in dollars per share) |  |  | $ 0.001 | $ 0.001 | $ 0.001 |
Common shares issued due to conversion of convertible shares | 5,000,000 |  |  |  |  | 5,000,000
Conversion of Class B common shares to Class A common shares (in shares) |  |  |  | (21,875,000) | (15,319,000) |
American Depository Shares |  |  |  |  |  |
Common shares |  |  |  |  |  |
Shares issued | 13,800,000 |  |  |  |  |
American Depository Shares | Non-vested shares |  |  |  |  |  |
Common shares |  |  |  |  |  |
Non-vested shares vested and converted into American Depository Shares |  |  |  | 1,740,044 | 2,358,044 |
Shares issued related to vesting and conversion of non-vested shares |  |  |  | 870,022 | 1,179,022 |
Series A convertible redeemable preferred shares |  |  |  |  |  |
Common shares |  |  |  |  |  |
Number of convertible shares converted | 5,000,000 |  |  |  |  |

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