Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheet Detail - Additional Information (Detail)

v3.7.0.1
Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Balance Sheet Related Disclosures [Abstract]      
Depreciation and amortization expense $ 2,953 $ 3,380 $ 3,683