Note 24 - Stock Options - Summary of Options Activities (Details) - Employee Stock Option Plan 2017 [Member] - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Outstanding. options (in shares)	236,375	267,000
Outstanding, weighted average exercise price (in dollars per share)	$ 5.21	$ 4.21
Outstanding, weighted average remaining contractual term (Year)	2 years 11 months 1 day	2 years 7 months 9 days	3 years 2 months 19 days
Aggregate intrinsic value outstanding	$ 140	$ 87	$ 290
Granted, options (in shares)	65,000	40,500
Granted, weighted average exercise price (in dollars per share)	$ 4.84	$ 7.76
Exercised, options (in shares)	(5,000)	(71,125)
Exercised, weighted average exercise price (in dollars per share)	$ 3.75	$ 2.93
Forfeited or expired, options (in shares)	(80,000)
Outstanding, options (in shares)	216,375	236,375	267,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.89	$ 5.21	$ 4.21
Exercisable, options (in shares)	134,625	160,500
Exercisable, weighted average exercise price (in dollars per share)	$ 4.49	$ 4.93
Exercisable, weighted average remaining contractual term (Year)	2 years 6 months 25 days	1 year 11 months 23 days
Exercisable, aggregate intrinsic value	$ 125	$ 66
Granted, weighted average remaining contractual term (Year)		4 years 8 months 23 days
Exercised, options (in shares)	(5,000)	(71,125)