Note 12 - Stockholder's Equity - Stock Option Outstanding (Details)	12 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Outstanding, number of options (in shares) | shares	0
Outstanding, options, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Granted, number of options (in shares) | shares	270,000
Granted, options, weighted average exercise price (in dollars per share) | $ / shares	$ 1.61
Exercised, number of options (in shares) | shares	0
Exercised, options, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Forfeited, number of options (in shares) | shares	0
Forfeited, options, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Outstanding, number of options (in shares) | shares	270,000
Outstanding, options, weighted average exercise price (in dollars per share) | $ / shares	$ 1.61
Outstanding, options, weighted average remaining contractual life (Year)	9 years 7 months 6 days
Outstanding, options, aggregate intrinsic value | $	$ 0
Exercisable, number of options (in shares) | shares	0
Exercisable, options, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Exercisable, options, weighted average remaining contractual life (Year)	0 years
Exercisable, options, aggregate intrinsic value | $	$ 0