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401(k) Plan	12 Months Ended
401(k) Plan	Jan. 31, 2018
Compensation And Retirement Disclosure [Abstract]
401(k) Plan	Note 14. 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.