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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Feb. 28, 2013
Feb. 29, 2012
Accounts payable $ 2,009,473 $ 2,863,596
Deferred revenue 102,513,876 85,594,032
Accrued expenses and other current liabilities 17,196,001 15,284,190
Income tax payable 2,778,305 637,302
Deferred tax liabilities-non-current 98,945 156,494
Variable Interest Entity
    
Accounts payable 1,739,337 1,993,297
Deferred revenue 67,743,448 50,395,945
Accrued expenses and other current liabilities 11,269,507 9,546,915
Income tax payable 2,165,785 2,206,266
Deferred tax liabilities-non-current $ 36,845 $ 45,881
Class A Common shares
    
Common shares, par value (in dollars per share) $ 0.001 $ 0.001
Common shares, shares authorized (in shares) 500,000,000 500,000,000
Common shares, shares issued (in shares) 68,314,150 45,277,044
Common shares, shares outstanding (in shares) 68,314,150 45,277,044
Class B Common shares
    
Common shares, par value (in dollars per share) $ 0.001 $ 0.001
Common shares, shares authorized (in shares) 500,000,000 500,000,000
Common shares, shares issued (in shares) 87,806,000 109,681,000
Common shares, shares outstanding (in shares) 87,806,000 109,681,000