Note 24 - Stock Options - Summary of Options Activities 2017 Directors Plan (Details) - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Director Plan 2017 [Member]
Outstanding. options (in shares)	420,000	320,000
Outstanding, weighted average exercise price (in dollars per share)	$ 5.10	$ 4.27
Outstanding, weighted average remaining contractual term (Year)	2 years 10 months 28 days	2 years 10 months 6 days	3 years 2 months 19 days
Aggregate intrinsic value outstanding	$ 309	$ 228	$ 340
Granted, options (in shares)	100,000	100,000
Granted, weighted average exercise price (in dollars per share)	$ 4.51	$ 7.76
Exercise of stock option (in shares)	20,000	0
Exercised, weighted average exercise price (in dollars per share)	$ 2.53
Forfeited or expired, options (in shares)	(80,000)
Forfeited or expired, weighted average exercise price (in dollars per share)	$ 5.98
Outstanding, options (in shares)	420,000	420,000	320,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.91	$ 5.10	$ 4.27
Exercisable, options (in shares)	420,000	420,000
Exercisable, weighted average exercise price (in dollars per share)	$ 4.91	$ 5.10
Exercisable, weighted average remaining contractual term (Year)	2 years 10 months 28 days	2 years 10 months 6 days
Exercisable, aggregate intrinsic value	$ 309	$ 228
Employee Stock Option Plan 2007 [Member]
Outstanding. options (in shares)	0	37,500
Outstanding, weighted average exercise price (in dollars per share)		$ 4.14
Outstanding, weighted average remaining contractual term (Year)			9 months
Aggregate intrinsic value outstanding			$ 34
Exercise of stock option (in shares)	0	37,500
Exercised, weighted average exercise price (in dollars per share)		$ 4.14
Outstanding, options (in shares)	0	0	37,500
Outstanding, weighted average exercise price (in dollars per share)			$ 4.14
Granted, weighted average remaining contractual term (Year)		4 years 8 months 23 days