Note 19 - Stock Options - Summary of Options Activities 2017 Directors Plan (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 24, 2007	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021	Jun. 30, 2020
Director Plan 2017 [Member]
Outstanding. options (in shares)				320,000	240,000	240,000
Outstanding, weighted average exercise price (in dollars per share)				$ 4.27	$ 3.93	$ 3.93
Outstanding, weighted average remaining contractual term (Year)				7 months 6 days	3 years 5 months 19 days	3 years 2 months 19 days	3 years 9 months
Aggregate intrinsic value outstanding, ending				$ 340	$ 48.00	$ 48.00
Granted, options (in shares)		100,000	80,000	100,000	80,000
Granted, weighted average exercise price (in dollars per share)				$ 7.76	$ 5.27
Outstanding, options (in shares)		420,000	320,000	420,000	320,000	320,000	240,000
Outstanding, weighted average exercise price (in dollars per share)		$ 5.10	$ 4.27	$ 5.10	$ 4.27	$ 4.27	$ 3.93
Aggregate intrinsic value outstanding, ending		$ 942	$ 253.6	$ 942	$ 253.6	$ 340	$ 48.00
Exercisable, options (in shares)		420,000	320,000	420,000	320,000
Exercisable, weighted average exercise price (in dollars per share)		$ 5.10	$ 4.27	$ 5.10	$ 4.27
Exercisable, weighted average remaining contractual term (Year)				3 years 25 days	3 years 5 months 19 days
Exercisable at March 31, 2021		$ 942	$ 253.6	$ 942	$ 253.6
Employee Stock Option Plan 2007 [Member]
Outstanding. options (in shares)				37,500	77,500	77,500
Outstanding, weighted average exercise price (in dollars per share)				$ 4.14	$ 3.69	$ 3.69
Outstanding, weighted average remaining contractual term (Year)					11 months 26 days	9 months	1 year 2 months 19 days
Aggregate intrinsic value outstanding, ending				$ 34
Granted, options (in shares)	600,000			0	0
Outstanding, options (in shares)			37,500		37,500	37,500	77,500
Outstanding, weighted average exercise price (in dollars per share)			$ 4.14		$ 4.14	$ 4.14	$ 3.69
Aggregate intrinsic value outstanding, ending			$ 13.13		$ 13.13	$ 34
Exercisable, options (in shares)			37,500		37,500
Exercisable, weighted average exercise price (in dollars per share)			$ 4.14		$ 4.14
Exercisable, weighted average remaining contractual term (Year)					11 months 26 days
Exercisable at March 31, 2021			$ 13.13		$ 13.13
Granted, weighted average remaining contractual term (Year)					4 years 10 months 20 days