Note 26 - Share-based Compensation Expenses - Options Issued and Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Options outstanding, number of underlying shares (in shares)	835,216	835,216
Options outstanding, weighted average remaining contractual life (Year)	2 years 14 days	3 years 14 days	4 years 14 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 2.49	$ 2.49
Option exercisable, number of underlying shares (in shares)	835,216	676,136
Option exercisable, weighted average remaining contractual life (Year)	2 years 14 days	3 years 14 days	4 years 40 days
Option exercisable, weighted average exercise price (in dollars per share)	$ 2.49	$ 2.59
Options outstanding, granted/vested shares (in shares)	0	0
Options outstanding, granted/vested, weighted average remaining contractual life (Year)		0 years
Options outstanding, granted/vested, weighted average exercise price (in dollars per share)	$ 0	$ 0
Option exercisable, granted/vested shares (in shares)		159,080
Option exercisable, granted/vested, weighted average remaining contractual life (Year)		2 years 255 days
Option exercisable, granted/vested, weighted average exercise price (in dollars per share)		$ 2.10
Options outstanding, forfeited (in shares)	0	0
Options outstanding, forfeited, weighted average exercise price (in dollars per share)	$ 0	$ 0
Options outstanding, exercised (in shares)	0	0
Options outstanding, exercised, weighted average exercise price (in dollars per share)	$ 0	$ 0
Options outstanding, number of underlying shares (in shares)	835,216	835,216	835,216
Options outstanding, weighted average exercise price (in dollars per share)	$ 2.49	$ 2.49	$ 2.49
Option exercisable, number of underlying shares (in shares)	835,216	835,216	676,136
Option exercisable, weighted average exercise price (in dollars per share)	$ 2.49	$ 2.49	$ 2.59