Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheet Detail - Additional Information (Detail)

v3.3.1.900
Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Balance Sheet Related Disclosures [Abstract]      
Depreciation and amortization expense $ 3,380 $ 3,683 $ 4,389