Note 18 - Earnings Per Share (Details Textual) - $ / shares	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding (in shares)	656,375	698,875	656,375	698,875
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share)	$ 2.53	$ 3.28
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share)	$ 7.76	$ 7.76
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	285,500	140,500	285,500	140,500