Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 27, 2019	Apr. 28, 2018
Roll-forward of other intangible assets
Balance at beginning of period	$ 18,190	$ 18,489
Acquisitions	13,000	255
Amortization	(945)	(959)
Translation adjustment	(338)	405
Balance at end of period	29,907	18,190
Trade Names
Roll-forward of other intangible assets
Acquisitions	6,400
Amortization	(599)
Balance at end of period	5,801
Reacquired Rights
Roll-forward of other intangible assets
Balance at beginning of period		524
Amortization		(542)
Translation adjustment		18
Other Intangible Assets
Roll-forward of other intangible assets
Balance at beginning of period	3,390	3,587
Amortization	(346)	(417)
Translation adjustment	(210)	220
Balance at end of period	2,834	3,390
Trade Names
Roll-forward of other intangible assets
Balance at beginning of period	1,155	1,155
Balance at end of period	1,155	1,155
Reacquired Rights
Roll-forward of other intangible assets
Balance at beginning of period	13,645	13,223
Acquisitions	6,600	255
Translation adjustment	(128)	167
Balance at end of period	$ 20,117	$ 13,645