Note 5 - Series B Preferred stock: Summary of the Series B Preferred Stock (Details) - Series B Preferred Stock - USD ($)	Dec. 31, 2025	Jun. 30, 2025
Preferred Stock, Shares Outstanding	14,150	12,850
Convertible preferred stock liability - Series B preferred stock, Par value $0.001 per share, 20,000 shares authorized and 14,150 and 12,850 shares issued and outstanding at December 31, 2025 and June 30, 2025, respectively; Stated value of $1,415,000 at December 31, 2025 and $1,285,000 at June 30, 2025	$ 1,124,619	$ 953,712
Summary
Preferred Stock, Shares Outstanding	1,285,000
Debt Instrument, Unamortized Discount	$ (256,866)
Convertible preferred stock liability - Series B preferred stock, Par value $0.001 per share, 20,000 shares authorized and 14,150 and 12,850 shares issued and outstanding at December 31, 2025 and June 30, 2025, respectively; Stated value of $1,415,000 at December 31, 2025 and $1,285,000 at June 30, 2025	$ 1,028,134
Amortization of the Discount
Preferred Stock, Shares Outstanding	130,000
Debt Instrument, Unamortized Discount	$ (33,515)
Convertible preferred stock liability - Series B preferred stock, Par value $0.001 per share, 20,000 shares authorized and 14,150 and 12,850 shares issued and outstanding at December 31, 2025 and June 30, 2025, respectively; Stated value of $1,415,000 at December 31, 2025 and $1,285,000 at June 30, 2025	$ 96,485
Carrying Amount
Preferred Stock, Shares Outstanding	1,415,000	1,285,000
Debt Instrument, Unamortized Discount	$ (290,381)
Convertible preferred stock liability - Series B preferred stock, Par value $0.001 per share, 20,000 shares authorized and 14,150 and 12,850 shares issued and outstanding at December 31, 2025 and June 30, 2025, respectively; Stated value of $1,415,000 at December 31, 2025 and $1,285,000 at June 30, 2025	$ 1,124,619