Nature of Business and Summary of Significant Accounting Policies Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	May 02, 2020	Apr. 28, 2019	Apr. 27, 2019
Accounting Changes and Error Corrections [Abstract]
Operating Lease, Right-of-Use Asset		$ 11,101
Operating lease liabilities	$ 2,416	2,745	$ 0
Operating Lease, Liability, Noncurrent		$ 8,356
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]		us-gaap:OtherLiabilitiesNoncurrent