Note 17 - Stock Incentive Plans - Share-based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Total compensation cost for share-based payments	$ 1,580	$ 1,757
Weighted average grant-date fair value of equity instruments granted (in dollars per share)	$ 1.16	$ 0.97
Total fair value of shares vested during the period	$ 1,432	$ 1,534
Unamortized share-based payments	$ 1,124	$ 1,438
Weighted average period to be recognized as expense (Year)	1 year 251 days	1 year 21 days