Nature of Business and Summary of Significant Accounting Policies Investment in affiliates (Details) - USD ($) $ in Thousands	12 Months Ended
May 02, 2020	Apr. 27, 2019	Apr. 28, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Equity Method Investment, Ownership Percentage	12.18%
Other Commitment	$ 5,000
Equity Method Investments	17,257	$ 3,657
Equity in loss of affiliate	741	844	$ 481
Equity Method Investment, Summarized Financial Information, Current Assets	10,593	192
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	4,266	2,626
Equity Method Investment, Summarized Financial Information, Current Liabilities	2,755	839
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	4,086	2,599
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ (1,383)	$ (2,168)	$ (1,493)

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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