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Business Combination	3 Months Ended
Business Combination	Apr. 30, 2018
Business Combinations [Abstract]
Business Combination	Business Combination On February 17, 2017, the Company acquired the rights to hire certain employees and a non-exclusive intellectual property license from Stormpath, Inc. (Stormpath), a privately-held technology company which had built a user management and authentication service for software development teams. The transaction was accounted for as a business combination. The total consideration of $3.7 million, consisting of 200,000 shares of common stock valued at $2.2 million, at the time of the transaction, issued to Stormpath and replacement awards of $1.5 million issued to the hired employees, was recognized as goodwill. In addition, the Company issued to Stormpath an incremental 800,000 shares of restricted common stock valued at $8.6 million, at the time of the transaction, which is being recognized as post-combination stock-based compensation expense. See Note 10 for further details.