v3.25.2
Note 13 - Stock-based Compensation - Assumptions (Details)
6 Months Ended
Jan. 29, 2025
Jun. 30, 2025
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member]    
Risk-free interest rate 4.38%  
Volatility 100.00%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 6 years 6 months  
Risk-free interest rate 4.38%  
Volatility 100.00%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 6 years 6 months  
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Vesting in Four Years [Member]    
Risk-free interest rate 4.55%  
Volatility 97.40%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 6 years  
Risk-free interest rate 4.55%  
Volatility 97.40%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 6 years  
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Vesting in Five Years [Member]    
Risk-free interest rate 4.55%  
Volatility 98.20%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 6 years 6 months  
Risk-free interest rate 4.55%  
Volatility 98.20%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 6 years 6 months  
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Chief Executive Officer [Member]    
Risk-free interest rate 4.55%  
Volatility 97.50%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 9 months 18 days  
Risk-free interest rate 4.55%  
Volatility 97.50%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 9 months 18 days  
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Nonemployee [Member]    
Risk-free interest rate 4.55%  
Volatility 98.00%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 6 months  
Risk-free interest rate 4.55%  
Volatility 98.00%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 6 months  
Employee Options with Quarterly Sales [Member] | Share-Based Payment Arrangement, Employee [Member]    
Risk-free interest rate 4.55%  
Volatility 98.40%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 3 months 18 days  
Risk-free interest rate 4.55%  
Volatility 98.40%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 3 months 18 days  
Employee Options, Tiered Sales Target [Member] | Share-Based Payment Arrangement, Employee [Member]    
Risk-free interest rate 4.55%  
Volatility 98.00%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 6 months  
Risk-free interest rate 4.55%  
Volatility 98.00%  
Expected dividend yield 0.00%  
Expected life (in years) (Year) 5 years 6 months  
Non-plan Options [Member] | Chief Commercial Officer [Member]    
Risk-free interest rate   4.62%
Volatility   97.00%
Expected dividend yield   0.00%
Expected life (in years) (Year)   5 years 9 months 18 days
Risk-free interest rate   4.62%
Volatility   97.00%
Expected dividend yield   0.00%
Expected life (in years) (Year)   5 years 9 months 18 days