Note 5 - Series B Preferred stock: Summary of the Series B Preferred Stock (Details) - Series B Preferred Stock - USD ($)	Jun. 30, 2026	Jun. 30, 2025
Preferred Stock, Shares Outstanding	14,515	12,855
Convertible preferred stock liability - Series B preferred stock, $0.001 par value per share, 20,000 shares authorized and 14,515 and 12,855 shares issued and outstanding as of June 30, 2026 and 2025, respectively; stated value of $1,451,500 and $1,285,500 as of June 30, 2026 and 2025	$ 1,246,921	$ 953,712
Summary
Preferred Stock, Shares Outstanding	1,285,500
Debt Instrument, Unamortized Discount	$ (178,468)
Convertible preferred stock liability - Series B preferred stock, $0.001 par value per share, 20,000 shares authorized and 14,515 and 12,855 shares issued and outstanding as of June 30, 2026 and 2025, respectively; stated value of $1,451,500 and $1,285,500 as of June 30, 2026 and 2025	$ 1,107,032
Amortization of the Discount
Preferred Stock, Shares Outstanding	130,000
Debt Instrument, Unamortized Discount	$ (26,111)
Convertible preferred stock liability - Series B preferred stock, $0.001 par value per share, 20,000 shares authorized and 14,515 and 12,855 shares issued and outstanding as of June 30, 2026 and 2025, respectively; stated value of $1,451,500 and $1,285,500 as of June 30, 2026 and 2025	$ 103,889
Carrying Amount
Preferred Stock, Shares Outstanding	1,451,500	1,285,500
Debt Instrument, Unamortized Discount	$ (204,579)	$ (331,788)
Convertible preferred stock liability - Series B preferred stock, $0.001 par value per share, 20,000 shares authorized and 14,515 and 12,855 shares issued and outstanding as of June 30, 2026 and 2025, respectively; stated value of $1,451,500 and $1,285,500 as of June 30, 2026 and 2025	$ 1,246,921	$ 953,712