Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheet Detail - Additional Information (Detail)

v3.5.0.2
Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2016
Oct. 31, 2015
Sep. 30, 2016
Aug. 31, 2016
Oct. 31, 2014
Balance Sheet Related Disclosures [Abstract]              
Assets held for sale $ 235   $ 235   $ 200 $ 300 $ 500
Loss on impairment of long-lived assets 99   99        
Depreciation and amortization expense $ 700 $ 900 $ 2,289 $ 2,554