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Stock-Based Compensation - Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Apr. 28, 2019	Apr. 29, 2018	Apr. 30, 2017
Shares
outstanding at beginning of year	0	15,600	83,600
granted	0	0	0
exercised	0	(15,600)	(68,000)
canceled/expired	0	0	0
outstanding at end of year	0	0	15,600
Weighted-Average Exercise Price
outstanding at beginning of year	$ 0	$ 7.14	$ 8.37
granted	0	0	0
exercised	0	7.14	8.65
canceled/expired	0	0	0
outstanding at end of year	$ 0	$ 0	$ 7.14

X

- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Weighted average price of options that were either forfeited or expired.

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- Definition

Net number of share options (or share units) granted during the period.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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