Note 19 - Stock Options - Summary of Options Activities (Details) - Employee Stock Option Plan 2017 [Member] - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021	Jun. 30, 2020
Outstanding. options (in shares)			267,000	196,000	196,000
Outstanding, weighted average exercise price (in dollars per share)			$ 4.21	$ 3.92	$ 3.92
Outstanding, weighted average remaining contractual term (Year)			2 years 9 months 18 days	3 years 5 months 19 days	3 years 2 months 19 days	3 years 8 months 19 days
Aggregate intrinsic value outstanding, ending			$ 290	$ 36.00	$ 36.00
Granted, options (in shares)	40,500	71,000	40,500	71,000
Exercised, options (in shares)			(41,125)	0
Exercised, weighted average exercise price (in dollars per share)			$ 2.86
Outstanding, options (in shares)	266,375	267,000	266,375	267,000	267,000	196,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.96	$ 4.21	$ 4.96	$ 4.21	$ 4.21	$ 3.92
Outstanding, weighted average remaining contractual term (Year)			2 years 9 months 18 days	3 years 5 months 19 days	3 years 2 months 19 days	3 years 8 months 19 days
Aggregate intrinsic value outstanding, ending	$ 621	$ 210.40	$ 621	$ 210.40	$ 290	$ 36.00
Exercisable, options (in shares)	170,500	149,750	170,500	149,750
Exercisable, weighted average exercise price (in dollars per share)	$ 4.81	$ 4.46	$ 4.81	$ 4.46
Exercisable, weighted average remaining contractual term (Year)			2 years 2 months 26 days	2 years 11 months 26 days
Exercisable at March 31, 2022	$ 415	$ 106.07	$ 415	$ 106.07
Granted, weighted average exercise price (in dollars per share)				$ 5.03
Aggregate intrinsic value outstanding, ending	621	210.40	621	$ 210.40	$ 290	$ 36.00
Exercisable at March 31, 2021	$ 415	$ 106.07	$ 415	$ 106.07