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401(k) Plan	12 Months Ended
401(k) Plan	Jan. 31, 2017
Compensation Related Costs [Abstract]
401(k) Plan	401(k) Plan We have a 401(k) savings plan (the 401(k) plan) which qualifies as a deferred salary arrangement under section 401(k) of the Internal Revenue Code. Under the 401(k) plan, participating employees may elect to contribute up to 100% of their eligible compensation, subject to certain limitations. We have not made any matching contributions to date.