Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Common Stock [Member]
Options exercised (in shares)	5,000	13,000	53,550
Shares issued under preferred stock offering (in shares)	2,000,000	2,000,000
Shares issued under preferred stock offering, offering costs	$ 1,675	$ 1,675
Options exercised (in shares)		13,000	53,550