Note 2 - Property, Plant and Equipment, Net (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jan. 25, 2025	Jan. 27, 2024	Jan. 25, 2025	Jan. 27, 2024	Apr. 27, 2024
Construction in Progress, Gross	$ 42.0		$ 42.0		$ 32.5
Depreciation	$ 4.9	$ 4.8	$ 15.0	$ 14.0

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Name:	us-gaap_Depreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration