Segment Information, Significant Customers and Geographic Information - Additional Information (Detail)
|3 Months Ended|
Apr. 30, 2018
|Segment Reporting [Abstract]|
|Number of reportable segment||1|
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.
No definition available.