Note 6 - Commitments & Contingencies (Details Textual) ft² in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 28, 2025 USD ($) ft²	Jun. 28, 2025 USD ($) ft²
Operating Lease, Cost	$ 41	$ 83
Norton Facility [Member]
Area of Real Estate Property \| ft²	38	38
Norton Facility [Member] \| Minimum [Member]
Lessee, Operating Lease, Annual Rent Payments		$ 160
Norton Facility [Member] \| Maximum [Member]
Lessee, Operating Lease, Annual Rent Payments		$ 165

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

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