Note 19 - Equity Incentive Plans - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Balance, shares (in shares)	35,880	82,670
Balance, weighted average excercise price (in dollars per share)	$ 23.37	$ 23.37
Balance, remaining contractual life (Year)		1 month 6 days	1 year 1 month 6 days
Balance, intrinsic value				$ 0	$ 0	$ 675	$ 1,211
Exercised, shares (in shares)	(35,880)	(46,790)
Exercised, weighted average excercise price (in dollars per share)	$ 23.37	$ 23.37
Balance, shares (in shares)	0	35,880	82,670
Balance, weighted average excercise price (in dollars per share)	$ 0	$ 23.37	$ 23.37
Balance, shares (in shares)	0	35,880	82,670	0	0	35,880	82,670
Balance, weighted average excercise price (in dollars per share)	$ 0	$ 23.37	$ 23.37	$ 0	$ 0	$ 23.37	$ 23.37