Note 6 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022	Jan. 01, 2023
Operating Lease, Expense	$ 100	$ 100	$ 300	$ 300
Operating and Finance Lease, Right of Use Asset	1,082		1,082		$ 1,397
Operating and Finance Lease Liability	1,105		1,105		1,394
Right of Use Asset Obtained in Exchange for Finance and Operating Lease Liability			445	0
Operating Lease, Right-of-Use Asset, Periodic Reduction			274	257
Finance Lease, Right-of-Use Asset, Amortization	163	$ 109	486	$ 328
Approximate [Member]
Operating and Finance Lease, Right of Use Asset	1,100		1,100		1,400
Operating and Finance Lease Liability	$ 1,100		$ 1,100		$ 1,400
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	1 year		1 year
Lessee, Finance Lease, Term of Contract (Year)	2 years		2 years
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	5 years		5 years
Lessee, Finance Lease, Term of Contract (Year)	3 years		3 years