Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Common Stock [Member]
Options exercised (in shares)	197,975	226,275	21,500
Shares issued (in shares)		18,691,589
Offering costs		$ 825
Additional Paid-in Capital [Member]
Conversion of subordinated debt, shares (in shares)	36,922
Options exercised (in shares)	197,975	226,275	21,500