Note 12 - Information Concerning Product Lines, Geographic Information and Revenue Concentration - Schedule of Revenue by Shipment Destination (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Revenue	$ 4,273	$ 6,665	$ 14,407	$ 13,719
Asia Pacific [Member]
Revenue	518	371	1,656	1,540
North America [Member]
Revenue	3,663	6,051	12,317	11,739
Europe [Member]
Revenue	$ 92	$ 243	$ 434	$ 440

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details