Note 6 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021	Jan. 02, 2022
Operating and Finance Lease, Right of Use Asset	$ 944		$ 944		$ 1,529
Operating and Finance Lease Liability	992		992		1,563
Operating Lease, Expense	100	$ 300	100	$ 300
Right of Use Asset Obtained in Exchange for Finance and Operating Lease Liability			0	$ 400
Approximate [Member]
Operating and Finance Lease, Right of Use Asset	900		900		1,500
Operating and Finance Lease Liability	$ 1,000		$ 1,000		$ 1,600
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