v3.26.3
Note 12 - Equity Transactions and Stock-based Compensation (Tables)
12 Months Ended
Jun. 30, 2026
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Risk Free Interest Rate

  3.94% to 4.41%

Volatility

  96.9% to 108.5%

Term

  7.5 to 10.0 years 

Dividend Rate

  0.00%

Closing Price of Common Stock

 $$0.18 to $0.32 
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
      

Weighted

 
      

Average

 
      

Exercise

 
  

Options

  

Price

 
         

Outstanding as of July 1, 2024

  4,749,183  $0.34 

Granted

  890,000   0.29 

Exercised

  (960,000)  0.09 

Terminated

  (11,833)  0.24 

Expired

  (186,000)  0.39 

Outstanding as of June 30, 2025

  4,481,350   0.34 

Granted

  726,500   0.29 

Exercised

  -   - 

Terminated

  (52,666)  0.30 

Expired

  (41,834)  0.54 

Outstanding as of June 30, 2026

  5,113,350  $0.38 
         

Exercisable at June 30, 2025

  3,277,517  $0.42 

Exercisable at June 30, 2026

  3,899,350  $0.40 
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
                   
                 Weighted 
         

Weighted

 Weighted Average   

Average

 

 

    

Average

 Remaining   

Exercise

 

Range of Exercise Price

 

Outstanding

 

Exercise Price

 Contractual Life (years)

Exercisable

 

Price

 
                   
$0.18-$0.20  400,000 $0.19 9.1 200,000 $0.19 
$0.21-$0.21  1,152,000  0.21 2.9 1,152,000  0.21 
$0.23-$0.23  100,000  0.23 0.4 100,000  0.23 
$0.24-$0.26  552,500  0.25 7.4 368,333  0.25 
$0.30-$0.33  400,000  0.32 8.0 400,000  0.32 
$0.31-$0.35  981,500  0.33 8.6 151,667  0.33 
$0.41-$0.41  386,500  0.41 6.4 386,500  0.41 
$0.51-$0.51  200,000  0.51 6.0 200,000  0.51 
$0.65-$0.65  538,000  0.65 4.4 538,000  0.65 
$0.95-$0.95  402,850  0.95 5.4 402,350  0.95 
$0.18-$0.95  5,113,350 $0.38 5.8 3,899,350 $0.40