Quarterly report pursuant to Section 13 or 15(d)

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

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Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Oct. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Balance at January 31, 2014 $ (2,132)
Other comprehensive loss (1,567)
Balance at October 31, 2014 (3,699)
Foreign Currency Translation Adjustment [Member]
 
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Balance at January 31, 2014 (2,150)
Other comprehensive loss (1,561)
Balance at October 31, 2014 (3,711)
Changes in Fair Value of Available for Sale Investments [Member]
 
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Balance at January 31, 2014 18
Other comprehensive loss (6)
Balance at October 31, 2014 $ 12