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Related Party Transactions	12 Months Ended
Related Party Transactions	Jan. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain members of our board of directors are executive officers of our end customers. During the years ended January 31, 2015, 2016 and 2017, we recognized revenue of $2.1 million, $6.2 million and $6.2 million, respectively, from sales transactions to these end customers. We purchased $420,000, $728,000 and $798,000 of products and related services from these end customers during the years ended January 31, 2015, 2016 and 2017.