Note 23 - Share-based Compensation Expenses - Options Issued and Outstanding (Details) - $ / shares			12 Months Ended
	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Options outstanding, number of underlying shares (in shares)		755,216	277,976	755,216
Options outstanding, weighted average remaining contractual life (Year)	10 months 28 days	1 year 1 month 24 days
Options outstanding, weighted average exercise price (in dollars per share)		$ 2.43	$ 3.00	$ 2.43
Option exercisable, number of underlying shares (in shares)		755,216	277,976	755,216
Option exercisable, weighted average remaining contractual life (Year)				10 months 28 days	1 year 1 month 24 days
Option exercisable, weighted average exercise price (in dollars per share)		$ 2.43	$ 3.00	$ 2.43
Options outstanding, granted/vested (in shares)				0
Options outstanding, exercised (in shares)				0
Options outstanding, expired (in shares)			(277,976)	(477,240)
Options outstanding, expired, weighted average exercise price (in dollars per share)			$ 3.00	$ 2.10
Option exercisable, granted/vested, weighted average exercise price (in dollars per share)			$ 3.00	$ 2.10