v3.26.1
Note 15 - Equity Incentive Plans (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 01, 2026
Jan. 01, 2025
Jan. 01, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jun. 30, 2025
Aug. 09, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)       101,105 5,555 424    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)       $ 2.82 $ 8.33      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value       $ 0 $ 10 $ 0    
Share-Based Payment Arrangement, Expense       $ 564 $ 229      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price (in dollars per share)       $ 8        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price (in dollars per share)       $ 114.62        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)       9 years 7 months 6 days 9 years 2 months 19 days 7 years 5 months 1 day    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year)       8 years 5 months 15 days        
Share-Based Payment Arrangement, Exercise of Option, Tax Benefit       $ 0        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value       $ 0 $ 2      
Share-Based Payment Arrangement, Option [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)       4 years        
Share-Based Payment Arrangement, Expense       $ 332 229      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 974        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       3 years 25 days        
Share-Based Payment Arrangement, Expense, Tax Benefit       $ 0        
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Tranche One [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage       25.00%        
Restricted Stock [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value       $ 0 8      
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares)       0        
Restricted Stock Units (RSUs) [Member]                
Share-Based Payment Arrangement, Expense       $ 232 2      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 316        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       3 years 1 month 17 days        
Share-based Payment Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Total Fair Value       $ 406 $ 170      
Share-Based Payment Arrangement, Employee [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Exercise Price, Percent of Market Value per Share       100.00%        
Parent or Subsidiary of Company [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Exercise Price, Percent of Market Value per Share       110.00%        
The 2021 Plan [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)     4,312          
Share-based Payment Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Percentage of Shares Outstanding           5.00%    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)               5,434
A&R 2021 Plan [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)   27,846            
Share-based Payment Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Percentage of Shares Outstanding       5.00% 5.00%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)             86,669 58,823
Ownership of Stock, Option Grants       10.00%        
A&R 2021 Plan [Member] | Subsequent Event [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 126,289              
A&R 2021 Plan, Amended [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)             511,669  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)       101,105