Note 23 - Stock Options - Summary of Options Activities (Details) - Employee Stock Option Plan 2017 [Member] - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Outstanding. options (in shares)	267,000	196,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.21	$ 3.92
Outstanding, weighted average remaining contractual term (Year)	2 years 7 months 9 days	3 years 2 months 19 days	3 years 8 months 19 days
Aggregate intrinsic value outstanding	$ 87	$ 290	$ 36
Granted, options (in shares)	40,500	71,000
Granted, weighted average exercise price (in dollars per share)	$ 7.76	$ 5.03
Granted (Year)	4 years 8 months 23 days	4 years 7 months 9 days
Exercised, options (in shares)	(71,125)	0
Exercised, weighted average exercise price (in dollars per share)	$ 2.93
Outstanding, options (in shares)	236,375	267,000	196,000
Outstanding, weighted average exercise price (in dollars per share)	$ 5.21	$ 4.21	$ 3.92
Exercisable, options (in shares)	160,500	164,750
Exercisable, , weighted average exercise price (in dollars per share)	$ 4.93	$ 4.35
Exercisable, weighted average remaining contractual term (Year)	1 year 11 months 23 days	2 years 8 months 26 days
Exercisable, aggregate intrinsic value	$ 66	$ 173
Granted (in dollars per share)		$ 14