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Redeemable Convertible Preferred Stock	12 Months Ended
Redeemable Convertible Preferred Stock	Apr. 30, 2013
Redeemable Convertible Preferred Stock	10. Redeemable Convertible Preferred Stock In February 2012, upon the consummation of the Company’s initial public offering, all 27,897,031 outstanding shares of our redeemable convertible preferred stock automatically converted into shares of common stock, in accordance with the terms of our certificate of incorporation.