Nature of Business and Basis of Presentation - Reclassification Reflected in Current Statements of Operations and Comprehensive Income (Loss) (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended |
---|---|---|
Jul. 31, 2012
|
Jul. 31, 2012
|
|
Basis Of Presentation [Line Items] | ||
Prior period reclassification adjustment | ||
Cost of Revenue Product [Member]
|
||
Basis Of Presentation [Line Items] | ||
Prior period reclassification adjustment | (58) | (112) |
Cost of Revenue Service [Member]
|
||
Basis Of Presentation [Line Items] | ||
Prior period reclassification adjustment | (248) | (487) |
Research and Development Expenses [Member]
|
||
Basis Of Presentation [Line Items] | ||
Prior period reclassification adjustment | (190) | (372) |
Selling and Marketing Expenses [Member]
|
||
Basis Of Presentation [Line Items] | ||
Prior period reclassification adjustment | (41) | (81) |
General and Administrative Expenses [Member]
|
||
Basis Of Presentation [Line Items] | ||
Prior period reclassification adjustment | $ 537 | $ 1,052 |