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Cash Flow Information - Cash Flow, Operating Capital (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	May 01, 2021	May 02, 2020
(Increase) decrease:
Account receivable	$ (33,876)	$ 4,864	$ (7,461)
Long-term receivables	(440)	1,737	(1,173)
Inventories	(61,159)	13,900	(8,347)
Contract assets	(9,545)	3,080	(1,931)
Prepaid expenses and other current assets	(7,661)	2,450	(1,403)
Income taxes receivables	121	(148)	533
Investment in affiliates and other assets	(357)	744	(3,137)
(Increase) decrease:
Accounts payable	33,002	(7,081)	2,377
Contract liabilities	27,398	12,628	4,548
Accrued expenses	6,354	(2,936)	6,745
Warranty obligations	1,160	696	273
Long-term warranty obligations	1,764	(367)	883
Income taxes payable	(379)	(173)	390
Long-term marketing obligations and other payables	(1,762)	2,337	(387)
Change in operating assets and liabilities	$ (45,380)	$ 31,731	$ (8,090)

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