Note 10 - Equity Compensation - Stock Options (Details) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Outstanding, shares (in shares)		1,706,963
Outstanding, weighted average exercise price (in dollars per share)		$ 5.7
Outstanding, weighted average remaining contractual term (Year)	5 years 3 months 18 days	5 years 4 months 24 days
Outstanding, aggregate intrinsic value	$ 13,305,057	$ 11,705,731
Granted (in shares)	255,000
Granted, weighted average exercise price (in dollars per share)	$ 14.6
Exercised (in shares)	(233,056)
Exercised, weighted average exercise price (in dollars per share)	$ 7.35
Forfeited (in shares)	0
Forfeited, weighted average exercise price (in dollars per share)	$ 0
Expired (in shares)	(1,760)
Expired, weighted average exercise price (in dollars per share)	$ 10.38
Outstanding, shares (in shares)	1,727,147
Outstanding, weighted average exercise price (in dollars per share)	$ 6.79
Exercisable, shares (in shares)	1,472,147
Exercisable, weighted average exercise price (in dollars per share)	$ 5.44
Exercisable, weighted average remaining contractual term (Year)	4 years 6 months
Exercisable, aggregate intrinsic value	$ 13,300,257
Vested and expected to vest, shares (in shares)	1,664,611
Vested and expected to vest at, weighted average exercise price (in dollars per share)	$ 6.49
Vested and expected to vest, weighted average remaining contractual term (Year)	5 years 1 month 6 days
Vested and expected to vest, aggregate intrinsic value	$ 13,303,742