Note 5 - Stockholders' Equity (Tables)

3 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	September 30, 2025			October 30, 2024
	Options			Options
Risk-free interest rate		—	%		4.22	%
Expected volatility		—	%		83.50	%
Dividend yield		—	%		—	%
Expected option term in years		—			5.5

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

			Wtd. Avg.
			Exercise
	Options		Price
Balance, July 1, 2025		450,000	$	0.65
Granted during the period		—		—
Exercised during the period		—		—
Cancelled during the period		—		—
Balance, September 30, 2025		450,000	$	0.65

			Wtd. Avg.
			Exercise
	Options		Price
Balance, July 1, 2024		250,000	$	1.10
Granted during the period		—		—
Exercised during the period		—		—
Canceled during the period		—		—
Balance, September 30, 2024		250,000	$	1.10

Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]

Range of		Number		Number		Wtd. Avg, Life		Wtd. Avg.
Exercise Price		Outstanding		Exercisable		(in years)		Exercise Price
$	0.65		450,000		294,000		8.29	$	0.65