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Note 5 - Stockholders' Equity (Details Textual) - USD ($)
3 Months Ended
Sep. 24, 2025
Oct. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)     1,500,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     1,020,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   200,000 0 0
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)   $ 0.65 $ 0 $ 0
Share-Based Payment Arrangement, Expense     $ 7,300 $ 5,000
Stock Issued During Period, Shares, Issued for Services (in shares) 652      
Vesting Immediately [Member] | Share-Based Payment Arrangement, Option [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   25.00%    
Vesting Annually [Member] | Share-Based Payment Arrangement, Option [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   25.00%