Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail)

v3.8.0.1
Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ (5,371) $ (6,613)
Other comprehensive loss (63) 1,242
Ending balance (5,434) (5,371)
Foreign Currency Translation Adjustment [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (5,377) (6,644)
Other comprehensive loss (3) 1,267
Ending balance (5,380) (5,377)
Changes in Fair Value of Available-for-Sale Investments [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 6 31
Other comprehensive loss (60) (25)
Ending balance $ (54) $ 6