v3.26.1
Note 5 - Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2026
Mar. 31, 2025
Jan. 31, 2025
Jun. 22, 2018
Sep. 07, 2017
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Jun. 30, 2024
Stock Issued During Period, Value, Issued for Services           $ 46,000 $ 61,000    
Share Price (in dollars per share)           $ 0.16      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0.18   $ 0.25            
2024 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)           10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Per Year (in shares)           2,000,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)           44,000,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)           24,892,531      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           2,314,455 2,024,538    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)           $ 0.16 $ 0.28    
2018 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)       10 years          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)                 9,343,614
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount           $ 280,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)               2 years  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)           (0) 566,951    
Stock Issued During Period, Shares, Cashless Exercise of Options (in shares)             265,800    
Equity Incentive Plan 2007 [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)         10 years        
Non Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)             32,143    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)             $ 0.28    
Share-Based Payment Arrangement, Option [Member] | 2024 Equity Incentive Plan [Member]                  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount           $ 846,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)           4 years      
Share-Based Payment Arrangement, Option [Member] | Non Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           0 32,143    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value             $ 8,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount           $ 39,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)           2 years      
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)             $ 0.28    
Share-Based Payment Arrangement, Option [Member] | Clyra Medical Technologies [Member]                  
Share-Based Payment Arrangement, Expense           $ 413,000 $ 206,000    
Share-Based Payment Arrangement, Option [Member] | Selling, General and Administrative [Member]                  
Share-Based Payment Arrangement, Expense           $ 699,000 $ 615,000    
Officer [Member]                  
Stock Issued During Period, Shares, Issued for Services (in shares)           69,444 11,250    
Shares Issued, Price Per Share (in dollars per share)   $ 0.28       $ 0.16 $ 0.28    
Stock Issued During Period, Value, Issued for Services   $ 3,000       $ 11,000      
Consultants and Vendors [Member]                  
Stock Issued During Period, Shares, Issued for Services (in shares)           212,963 209,080    
Shares Issued, Price Per Share (in dollars per share)   $ 0.28       $ 0.16 $ 0.28    
Stock Issued During Period, Value, Issued for Services           $ 35,000 $ 58,000    
Board of Directors, Employees, and Consultants [Member] | 2024 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           2,314,455 2,024,538    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value           $ 325,000 $ 491,000    
Director [Member] | 2024 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           439,816 334,820    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value           $ 61,000 $ 82,000    
Employees [Member] | Employee Retention Program [Member] | 2024 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           879,169 809,645    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value           $ 121,000 $ 199,000    
Consultants [Member] | 2024 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           695,470 580,073    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value           $ 97,000 $ 143,000    
Chief Financial Officer [Member] | 2024 Equity Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           300,000 300,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value           $ 46,000 $ 67,000    
Chief Financial Officer [Member] | Share-Based Payment Arrangement, Option [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)     10 years            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 300,000   300,000            
Engagement Extension, Term (Year) 1 year   1 year            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross, Per Month (in shares) 25,000   25,000