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Note 8 - Leases (Details Textual)
$ in Thousands
12 Months Ended
Dec. 29, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jan. 01, 2023
USD ($)
Apr. 30, 2019
ft²
Feb. 28, 2019
ft²
Operating Lease, Expense | $ $ 400 $ 400 $ 400    
Operating Lease, Right-of-Use Asset, Periodic Reduction | $ $ 269 $ 348      
Office In California [Member]          
Lessee, Operating Lease, Term of Contract (Year)         5 years
Area of Real Estate Property (Square Foot) | ft²         24,164
Beaverton Oregon [Member]          
Lessee, Operating Lease, Term of Contract (Year)       4 years  
Area of Real Estate Property (Square Foot) | ft²       925  
Minimum [Member]          
Lessee, Operating Lease, Term of Contract (Year)   1 year      
Maximum [Member]          
Lessee, Operating Lease, Term of Contract (Year)   5 years