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Selected Financial Statement Data - Other (Expense) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 28, 2018	Apr. 29, 2017	Apr. 30, 2016
Selected Financial Statement Data [Abstract]
Foreign currency transaction losses	$ 29	$ (331)	$ (326)
Equity in losses of affiliate	(481)	(136)	0
Other Nonoperating Expense	(85)
Other		113	198
Other (expense) income, net	$ (537)	$ (354)	$ (128)

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Selected Financial Statement Data [Abstract]

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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-Publisher FASB
-Name Accounting Standards Codification
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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of expense related to nonoperating activities, classified as other.

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