Acquisitions - Additional Information (Details)		9 Months Ended
	May. 04, 2015 USD ($)	Oct. 31, 2015 USD ($) Company
Business Acquisition [Line Items]
Business acquisition, goodwill		$ 415,000
Number of companies purchased and licensed | Company		2
Business acquisition, aggregate purchase price		$ 764,000
Developed Technology
Business Acquisition [Line Items]
Business acquisition, developed technology		$ 349,000
Weighted average useful life		2 years
Verold, Inc.
Business Acquisition [Line Items]
Business acquisition, Purchase price paid in stock	$ 5,400,000
Business acquisition, goodwill	2,600,000	$ 2,644,000
Verold, Inc. | Developed Technology
Business Acquisition [Line Items]
Business acquisition, developed technology	$ 2,800,000
Weighted average useful life	2 years