Note 14 - Share-based Compensation - SARs Activity (Stock Appreciation Rights (SARs) (Details) - Stock Appreciation Rights (SARs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance, restricted share units (in shares)	2,485,000	2,485,000
Balance, weighted average grant date fair value (in dollars per share)	$ 7.33	$ 7.33
Expired (in shares)	(2,485,000)
Expired, weighted average exercise price (in dollars per share)	$ 7.33
Balance, restricted share units (in shares)	0	2,485,000
Balance, weighted average grant date fair value (in dollars per share)		$ 7.33