Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Loss - Schedule of Changes in Components of Accumulated Other Comprehensive Loss (Detail)

v3.7.0.1
Accumulated Other Comprehensive Loss - Schedule of Changes in Components of Accumulated Other Comprehensive Loss (Detail)
$ in Thousands
6 Months Ended
Jul. 31, 2017
USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance $ (5,371)
Other comprehensive loss (2)
Ending balance (5,373)
Cumulative Translation Adjustment [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance (5,377)
Other comprehensive loss 3
Ending balance (5,374)
Unrealized Gain/Loss on Investments [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance 6
Other comprehensive loss (5)
Ending balance $ 1