Note 19 - Stock Options - Summary of Options Activities 2007 Directors Plan (Details) - Director Plan 2007 [Member] - USD ($)	9 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021	Jun. 30, 2020
Outstanding. options (in shares)	50,000	250,000	250,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.14	$ 3.32	$ 3.32
Outstanding, weighted average remaining contractual term (Year)		11 months 26 days	9 months	9 months 29 days
Aggregate intrinsic value outstanding, ending	$ 45	$ 22.00	$ 22.00
Exercised, options (in shares)	(50,000)	(200,000)
Exercised, weighted average exercise price (in dollars per share)	$ 4.14	$ 3.12
Outstanding, options (in shares)		50,000	50,000	250,000
Outstanding, weighted average exercise price (in dollars per share)		$ 4.14	$ 4.14	$ 3.32
Aggregate intrinsic value outstanding, ending		$ 17.50	$ 45	$ 22.00
Exercisable, options (in shares)		50,000
Exercisable, weighted average exercise price (in dollars per share)		$ 4.14
Exercisable, weighted average remaining contractual term (Year)		11 months 26 days
Exercisable at March 31, 2021		$ 17.50