v3.26.1
Note 4 - Intangible Assets - Intangible Assets (Details) - USD ($)
Mar. 31, 2026
Mar. 31, 2025
Cost $ 50,309 $ 50,309
Intangible Asset, Finite-Lived, Accumulated Amortization 42,059 35,242
Net carrying amount 8,250 15,067
Accumulated amortization (42,059) (35,242)
Intangible assets, net of accumulated amortization of $40,389 and $35,242 at March 31, 2026 and March 31, 2025, respectively $ 8,250 $ 15,067
Minimum [Member]    
Finite-Lived Intangible Assets, Useful Life (Year) 3 years  
Maximum [Member]    
Finite-Lived Intangible Assets, Useful Life (Year) 15 years  
Patents And Trademarks [Member]    
Cost $ 35,794  
Finite-Lived Intangible Assets, Useful Life (Year)   15 years
Intangible Asset, Finite-Lived, Accumulated Amortization 29,959 $ 27,982
Net carrying amount   7,812
Accumulated amortization $ (29,959) (27,982)
Intangible assets, net of accumulated amortization of $40,389 and $35,242 at March 31, 2026 and March 31, 2025, respectively   7,812
Patents And Trademarks [Member] | Minimum [Member]    
Cost   $ 35,794
Finite-Lived Intangible Assets, Useful Life (Year) 10 years 10 years
Net carrying amount $ 5,835  
Intangible assets, net of accumulated amortization of $40,389 and $35,242 at March 31, 2026 and March 31, 2025, respectively $ 5,835  
Patents And Trademarks [Member] | Maximum [Member]    
Finite-Lived Intangible Assets, Useful Life (Year) 15 years  
Software [Member]    
Cost $ 14,515 $ 14,515
Finite-Lived Intangible Assets, Useful Life (Year) 3 years 3 years
Intangible Asset, Finite-Lived, Accumulated Amortization $ 12,100 $ 7,260
Net carrying amount 2,415 7,255
Accumulated amortization (12,100) (7,260)
Intangible assets, net of accumulated amortization of $40,389 and $35,242 at March 31, 2026 and March 31, 2025, respectively $ 2,415 $ 7,255