Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Common stock, par value (in dollars per share)	$ 0.01
Common Stock Outstanding [Member]
Common stock, par value (in dollars per share)	0.01	$ 0.01
Retained Earnings [Member]
Cash dividend, per share (in dollars per share)	$ 0.09