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Note 6 - Leases (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 03, 2022
Jul. 04, 2021
Jul. 03, 2022
Jul. 04, 2021
Jan. 02, 2022
Operating and Finance Lease, Right of Use Asset $ 1,141   $ 1,141   $ 1,529
Operating and Finance Lease Liability 1,187   1,187   1,563
Operating Lease, Expense 100 $ 200 100 $ 200  
Right of Use Asset Obtained in Exchange for Finance and Operating Lease Liability     0 $ 0  
Approximate [Member]          
Operating and Finance Lease, Right of Use Asset 1,100   1,100   1,500
Operating and Finance Lease Liability $ 1,200   $ 1,200   $ 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