Note 23 - Stock Options - Summary of Options Activities 2017 Directors Plan (Details) - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Director Plan 2017 [Member]
Outstanding. options (in shares)	320,000	240,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.27	$ 3.93
Outstanding, weighted average remaining contractual term (Year)	2 years 10 months 6 days	3 years 2 months 19 days	3 years 9 months
Aggregate intrinsic value outstanding	$ 228	$ 340	$ 48
Granted, options (in shares)	100,000	80,000
Granted, weighted average exercise price (in dollars per share)	$ 7.76	$ 5.27
Granted (Year)	4 years 8 months 23 days
Outstanding, options (in shares)	420,000	320,000	240,000
Outstanding, weighted average exercise price (in dollars per share)	$ 5.10	$ 4.27	$ 3.93
Exercisable, options (in shares)	420,000	320,000
Exercisable, , weighted average exercise price (in dollars per share)	$ 5.10	$ 4.27
Exercisable, weighted average remaining contractual term (Year)	2 years 10 months 6 days	3 years 2 months 19 days
Exercisable, aggregate intrinsic value	$ 228	$ 340
Employee Stock Option Plan 2007 [Member]
Outstanding. options (in shares)	37,500	77,500
Outstanding, weighted average exercise price (in dollars per share)	$ 4.14	$ 3.69
Outstanding, weighted average remaining contractual term (Year)		9 months	1 year 2 months 19 days
Aggregate intrinsic value outstanding	$ 0	$ 34	$ 0
Granted, weighted average exercise price (in dollars per share)		$ 0
Granted (Year)		4 years 7 months 20 days
Outstanding, options (in shares)	0	37,500	77,500
Outstanding, weighted average exercise price (in dollars per share)	$ 0	$ 4.14	$ 3.69
Exercisable, options (in shares)	0	37,500
Exercisable, , weighted average exercise price (in dollars per share)	$ 0	$ 4.14
Exercisable, weighted average remaining contractual term (Year)		9 months
Exercisable, aggregate intrinsic value		$ 34
Granted (in dollars per share)		$ 0