Additional Information Pertaining to Stock Options (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Jul. 31, 2015 |
Jul. 31, 2014 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Total fair value of stock options vested | $ 96 | $ 324 |
Total intrinsic value of stock options exercised | $ 1,360 | $ 1,039 |
X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
X | ||||||||||
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|