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Stockholders' Equity - Share Based Payment Award Performance Shares Valuation Assumptions (Detail) | 12 Months Ended
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Apr. 30, 2017 CorrelationCoefficient $ / shares | Apr. 30, 2016 CorrelationCoefficient $ / shares | Apr. 30, 2015 CorrelationCoefficient $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Correlation coefficient | CorrelationCoefficient | [1] | 0.22 | 0.32 | 0.32
Risk-free interest rate | [2] | 1.44% | 0.93% | 0.91%
Dividend yield | [3] | 0.00% | 0.00% | 0.00%
American Outdoor Brands Corporation | PSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grant date fair market value |  | $ 21.89 | $ 21.93 | $ 14.90
Volatility | [4] | 41.67% | 39.93% | 44.51%
Russell 2000 Index |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grant date fair market value |  | $ 1,417.13 | $ 1,140.40 | $ 1,246.95
Volatility | [4] | 16.77% | 16.75% | 15.76%
[1] | The correlation coefficient utilizes the same historical price data used to develop the volatility assumptions.
[2] | The risk-free interest rate is based on the yield of a zero-coupon U.S. Treasury bill, commensurate with the three-year performance period.
[3] | We do not expect to pay dividends in the foreseeable future.
[4] | Expected volatility is calculated over the most recent period that represents the remaining term of the performance period as of the valuation date, or three years.

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- Definition Share based compensation arrangement by share based payment award fair value assumptions correlation coefficient. + References No definition available. + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- 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. + References No definition available. + Details
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