Note 6 - Bitcoin (Details Textual)	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2026 USD ($)	Apr. 30, 2026 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2026 USD ($)	Apr. 30, 2025 USD ($)
Crypto Asset, Unrealized Loss, Nonoperating		$ (762)	$ 0	$ (3,919)	$ 0
Bitcoin [Member]
Crypto Asset, Purchase, Units	0.50096
Payments to Acquire Crypto Assets, Gross	$ 42,560
Payments to Acquire Crypto Assets, Purchase Fees	$ 421
Crypto Asset, Fair Value		$ 38,220		$ 38,220
Crypto Asset, Number of Units		0.50096		0.50096
Crypto Asset, Unrealized Loss, Nonoperating				$ (3,919)