v3.26.3
Note 6 - Stockholders' Equity (Tables)
12 Months Ended
Jun. 30, 2026
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
  

April 27, 2026

  

March 25, 2025

 
  

Options

  

Options

 
         

Risk-free interest rate

  4.29%  4.35%

Expected volatility

  89.9%  83.50%

Dividend yield

  —%  —%

Expected option term in years

  6.3   2.4 
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
      

Wtd. Avg.

 
      

Exercise

 
  

Options

  

Price

 

Balance, July 1, 2025

  450,000  $0.65 

Granted during the period

  75,000   0.69 

Exercised during the period

  —   — 

Cancelled during the period

  —   — 

Balance, June 30, 2026

  525,000  $0.66 
      

Wtd. Avg.

 
      

Exercise

 
  

Options

  

Price

 

Balance, July 1, 2024

  250,000  $1.10 

Granted during the period

  450,000   0.65 

Exercised during the period

  —   — 

Canceled during the period

  (250,000)  1.10 

Balance, June 30, 2025

  450,000  $0.65 
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]

Range of

  

Number

  

Number

  

Wtd. Avg, Life

  

Wtd. Avg.

 

Exercise Price

  

Outstanding

  

Exercisable

  

(in years)

  

Exercise Price

 
 $0.65 - $0.69   525,000   398,438   7.87  $0.65