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COMMON STOCK AND STOCK-BASED COMPENSATION (Tables) (2010 and 2007 Stock Plans) | 9 Months Ended
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Jan. 31, 2015
2010 and 2007 Stock Plans |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Fair value assumptions for shares granted under stock plans | We estimated the fair value of the shares granted under both the 2010 Stock Plan and the 2007 Stock Plan on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
| Fiscal 2015
| Awards
Average expected volatility | 51.00 | %
Average risk-free interest rate | 1.00 | %
Dividend yield | 1.66 | %
Expected life of options (in years) | 4.12 |
Weighted-average grant-date fair value | $ | 14.99 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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