Quarterly report pursuant to Section 13 or 15(d)

Segment Information, Significant Customers and Geographic Information - Additional Information (Detail)

v2.4.1.9
Segment Information, Significant Customers and Geographic Information - Additional Information (Detail)
3 Months Ended
Apr. 30, 2015
Segment
Segment Reporting [Abstract]  
Number of reportable segment 1us-gaap_NumberOfReportableSegments