|
Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
|
9 Months Ended |
|
|
Jan. 31, 2014
|
Jan. 31, 2013
|
Sep. 13, 2012
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Description |
Each share issued pursuant to a stock option will reduce the shares available for grant by one, and each share issued pursuant to an award of restricted stock or restricted stock units will reduce the shares available for grant by two. |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in Shares) |
303,374 |
|
14,000 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |
$ 23,615 |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |
6 years 73 days |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price (in Dollars per share) |
$ 25.08 |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term |
4 years 219 days |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value |
13,224 |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |
2,549 |
|
|
| Share-based Compensation |
4,001 |
3,165 |
|
|
Restricted Stock Units (RSUs) [Member] | Certain Officers And Key Employees [Member]
|
|
|
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures (in Shares) |
77,650 |
|
|
|
Restricted Stock Units (RSUs) [Member]
|
|
|
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |
|
5,085 |
|
|
Stock Options [Member]
|
|
|
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |
$ 847 |
|
|
|
2009 Stock Incentive Plan [Member]
|
|
|
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) |
4,153,608 |
|
|
|
Plan and Prior Plan [Member]
|
|
|
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares) |
731,374 |
|
|
|
Certain Officers And Key Employees [Member]
|
|
|
|
| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) [Line Items] |
|
|
|
| Shares Granted Date |
June 7, 2013 and June 19, 2013 |
|
|
| Vesting Period |
May 1, 2014 |
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