v3.26.1
Note 4 - Intangible Assets - Intangible Assets (Details) - USD ($)
Jun. 30, 2026
Mar. 31, 2026
Cost $ 50,309 $ 50,309
Accumulated amortization 43,700 42,059
Net carrying amount 6,609 8,250
Accumulated amortization (43,700) (42,059)
Intangible assets, net of accumulated amortization of $43,700 and $42,059 at June 30, 2026 and March 31, 2026, respectively 6,609 8,250
Patents And Trademarks [Member]    
Cost 35,794 35,794
Accumulated amortization 30,390 29,959
Net carrying amount 5,404 5,835
Accumulated amortization (30,390) (29,959)
Intangible assets, net of accumulated amortization of $43,700 and $42,059 at June 30, 2026 and March 31, 2026, respectively $ 5,404 $ 5,835
Patents And Trademarks [Member] | Minimum [Member]    
Finite-Lived Intangible Assets, Useful Life (Year) 10 years 10 years
Patents And Trademarks [Member] | Maximum [Member]    
Finite-Lived Intangible Assets, Useful Life (Year) 15 years 15 years
Software [Member]    
Cost $ 14,515 $ 14,515
Finite-Lived Intangible Assets, Useful Life (Year) 3 years 3 years
Accumulated amortization $ 13,310 $ 12,100
Net carrying amount 1,205 2,415
Accumulated amortization (13,310) (12,100)
Intangible assets, net of accumulated amortization of $43,700 and $42,059 at June 30, 2026 and March 31, 2026, respectively $ 1,205 $ 2,415