Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheet Detail - Additional Information (Detail)

v3.7.0.1
Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Balance Sheet Related Disclosures [Abstract]    
Depreciation and amortization expense $ 620 $ 794