Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Common Stock Outstanding [Member]
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Retained Earnings [Member]
Cash dividend, per share (in dollars per share)	0.09
Common stock, par value (in dollars per share)	0.01
Cash dividend, per share (in dollars per share)	$ 0.09