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Stock-Based Compensation (Tables) | 6 Months Ended
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Oct. 28, 2018
Summary of Assumptions Used to Determine Fair Value of Performance Based Restricted Stock Units | The following table provides assumptions used to determine the fair market value of the market-based shareholder return component using the Monte Carlo simulation model on the date of grants noted above:
|  | Fiscal 2019 |  |  | Fiscal 2018 |
Closing price of our common stock |  | $ | 24.35 |  |  | $ | 32.50 |
Expected volatility of our common stock |  |  | 33.5 | % |  |  | 31.0 | %
Expected volatility of peer companies |  |  | 16.0 | % |  |  | 16.5 | %
Risk-free interest rate |  |  | 2.74 | % |  |  | 1.56 | %
Dividend yield |  |  | 1.35 | % |  |  | 1.66 | %
Correlation coefficient of peer companies |  |  | 0.47 |  |  |  | 0.46 |
Summary of Vested Performance Based Restricted Stock Units | The following table summarizes information related to our performance based restricted stock units that vested during the six-month periods ending October 28, 2018 and October 29, 2017:
Fiscal Year |  | Common Stock Shares Vested |  |  | (3) Weighted Average Fair Value |  |  | Price Per Share |
Fiscal 2019 (1) |  |  | 107,553 |  |  | $ | 3,466 |  |  | $ | 32.23 | (4)
Fiscal 2019 (2) |  |  | 10,364 |  |  | $ | 320 |  |  | $ | 30.90 | (5)
Fiscal 2018 (1) |  |  | 102,845 |  |  | $ | 1,820 |  |  | $ | 17.70 | (4)
Fiscal 2018 (2) |  |  | 16,000 |  |  | $ | 520 |  |  | $ | 32.50 | (5)
(1) | NEOs and key employees.
(2) | Non-employee
(3) | Dollar amounts are in thousands.
(4) | Price per share represents closing price of our common stock on the date of grant.
(5) | The respective grant vested during the first quarter of fiscal 2019 or 2018, respectively. Accordingly, the price per share represents the closing price of our common stock on the date the award vested.
Non-employee [Member] |
Summary of Grants of Performance Based Restricted Stock Units | The following table summarizes information related to our grants of performance-based restricted stock units associated with a non-employee that are currently unvested:
Date of Grant |  | (1) Restricted Stock Units Awarded |  |  | Price Per Share |  |  | Vesting Period |
July 14, 2016 |  |  | 11,549 |  |  | $ | 22.31 | (2) |  |  | 3 years |
(1) | Amounts represent the maximum number of common stock shares that could be earned if certain performance targets are met as defined in the related restricted stock unit agreements.
(2) | The respective grant was unvested at the end of our reporting period. Accordingly, the price per share represents the closing price of our common stock on October 28, 2018, the end of our reporting period.
NEOs and Key Employees [Member] |
Summary of Grants of Performance Based Restricted Stock Units | The following table summarizes information related to our grants of performance based restricted stock units associated with NEOs and key employees that are currently unvested:
Date of Grant |  | (3) Restricted Stock Units Awarded |  |  | Price Per Share |  |  | Vesting Period |
August 2, 2018 (1) |  |  | 86,599 |  |  | $ | 18.51 | (4) |  |  | 3 years |
August 2, 2018 (2) |  |  | 47,800 |  |  | $ | 24.35 | (6) |  |  | 3 years |
July 13, 2017 (1) |  |  | 78,195 |  |  | $ | 31.85 | (5) |  |  | 3 years |
July 13, 2017 (2) |  |  | 44,000 |  |  | $ | 32.50 | (6) |  |  | 3 years |
July 14, 2016 (1) (2) |  |  | 107,880 |  |  | $ | 28.00 | (6) |  |  | 3 years |
(1) | Performance-based restricted stock units awarded to NEOs.
(2) | Performance-based restricted stock units awarded to key employees.
(3) | Amounts represent the maximum number of common stock shares that could be earned if certain performance targets are met as defined in the related restricted stock unit agreements.
(4) | Price per share represents the fair market value per share ($0.76 per $1 or a reduction of $5.84 to the closing price of the our common stock) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($24.35) for the performance-based components of the performance-based restricted stock units granted to our NEOs on August 2, 2018.
(5) | Price per share represents the fair market value per share ($0.98 per $1 or a reduction of $0.65 to the closing price of the our common stock) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($32.50) for the performance-based components of the performance-based restricted stock units granted to our NEOs on July 13, 2017.
(6) | Price per share represents the closing price of our common stock on the date of grant.

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding restricted stock units that are fully vested and expected to vest. Includes, but is not limited to, unvested restricted stock units for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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