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Note 1 - The Company and Basis of Presentation (Details Textual) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 05, 2024
Mar. 13, 2024
Mar. 21, 2023
Sep. 14, 2022
Feb. 09, 2022
Dec. 29, 2024
Dec. 31, 2023
Jan. 01, 2023
Jan. 02, 2022
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents           $ 21,880 $ 24,606 $ 19,201 $ 19,605
Line of Credit, Current           18,000 20,000    
Proceeds from Issuance of Common Stock           6,810 2,313 4,682  
Payments of Stock Issuance Costs           24 20 17  
Recorded Sales Return Reversal           1 8 $ 2  
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property           $ 0 0    
Internal Use Software [Member]                  
Property, Plant and Equipment, Useful Life (Year)           5 years      
Pre-Product Design And Development [Member]                  
Property, Plant and Equipment, Useful Life (Year)           7 years      
Minimum [Member]                  
Property, Plant and Equipment, Useful Life (Year)           1 year      
Finite-Lived Intangible Asset, Useful Life (Year)           5 years      
Minimum [Member] | Leasehold Improvements [Member]                  
Property, Plant and Equipment, Useful Life (Year)           3 years      
Maximum [Member]                  
Property, Plant and Equipment, Useful Life (Year)           10 years      
Finite-Lived Intangible Asset, Useful Life (Year)           7 years      
Maximum [Member] | Leasehold Improvements [Member]                  
Property, Plant and Equipment, Useful Life (Year)           5 years      
Registered Direct Offering [Member]                  
Stock Issued During Period, Shares, New Issues (in shares) 424 223 450 487 310        
Proceeds from Issuance of Common Stock $ 3,200 $ 3,500 $ 2,300 $ 3,200 $ 1,500 $ 6,800      
Payments of Stock Issuance Costs $ 27 $ 24              
Heritage Bank of Commerce [Member] | Revolving Credit Facility [Member]                  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents           21,900      
Line of Credit, Current           $ 18,000 $ 20,000