Note 20 - Stock Options - Summary of Options Activities 2007 Directors Plan (Details) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Director Plan 2007 [Member]
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)	2 months 26 days		5 months 19 days	9 months	9 months 29 days
Aggregate intrinsic value outstanding, ending			$ 45	$ 45	$ 22
Outstanding, options (in shares)	50,000	50,000	200,000	50,000	250,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.14	$ 4.14	$ 3.48	$ 4.14	$ 3.32
Aggregate intrinsic value outstanding, ending	$ 465	$ 465	$ 105		$ 45
Exercisable, options (in shares)	50,000	50,000	200,000
Exercisable, weighted average exercise price (in dollars per share)	$ 4.14	$ 4.14	$ 3.48
Exercisable, weighted average remaining contractual term (Year)	2 months 26 days		5 months 19 days
Exercisable at December 31, 2021	$ 465	$ 465	$ 105
Exercised, options (in shares)		0	(50,000)
Exercised, weighted average exercise price (in dollars per share)			$ 2.69
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)		2 months 26 days	8 months 15 days	9 months	1 year 2 months 19 days
Aggregate intrinsic value outstanding, ending		$ 34
Outstanding, options (in shares)	37,500	37,500	77,500	37,500	77,500
Outstanding, weighted average exercise price (in dollars per share)	$ 4.14	$ 4.14	$ 3.69	$ 4.14	$ 3.69
Aggregate intrinsic value outstanding, ending	$ 348	$ 348	$ 28.00	$ 34
Exercisable, options (in shares)	37,500	37,500	77,500
Exercisable, weighted average exercise price (in dollars per share)	$ 4.14	$ 4.14	$ 3.69
Exercisable, weighted average remaining contractual term (Year)		2 months 26 days	8 months 15 days
Exercisable at December 31, 2021	$ 348	$ 348	$ 28.00
Exercised, options (in shares)		0	0
Exercised			$ 0