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CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS EQUITY (DEFICIT) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014
Series E-1 Redeemable Convertible Preferred Stock
Issuance of redeemable convertible preferred stock issuance cost		$ 36
Series F Redeemable Convertible Preferred Stock
Issuance of redeemable convertible preferred stock issuance cost	$ 386

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