Note 20 - Stock Options - Summary of Options Activities (Details) - Employee Stock Option Plan 2017 [Member] - USD ($)	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	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 7 months 28 days	3 years 3 months 21 days	3 years 2 months 19 days	3 years 8 months 19 days
Aggregate intrinsic value outstanding, ending		$ 290	$ 290	$ 36.00
Outstanding, options (in shares)	225,875	207,000	267,000	196,000
Outstanding, weighted average exercise price (in dollars per share)	$ 4.46	$ 3.91	$ 4.21	$ 3.92
Outstanding, weighted average remaining contractual term (Year)	2 years 7 months 28 days	3 years 3 months 21 days	3 years 2 months 19 days	3 years 8 months 19 days
Aggregate intrinsic value outstanding, ending	$ 2,026	$ 132.49		$ 290
Exercisable, options (in shares)	130,375	104,750
Exercisable, weighted average exercise price (in dollars per share)	$ 4.79	$ 4.40
Exercisable, weighted average remaining contractual term (Year)	2 years	2 years 11 months 15 days
Exercisable at December 31, 2021	$ 1,127	$ 45.00
Aggregate intrinsic value outstanding, ending	2,026	132.49		$ 290
Exercisable at December 31, 2021	$ 1,127	$ 45.00