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Related Party Transactions	12 Months Ended
Related Party Transactions	Jan. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain members of the Company's board of directors serve as directors of and/or are executive officers of and, in some cases, are investors in, companies that are customers or vendors of the Company. Certain of the Company’s executive officers also serve as directors of or serve in an advisory capacity to companies that are customers or vendors of the Company. Related party transactions were not material as of and for the years ended January 31, 2018, 2017 and 2016.