Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Shares of stock (in shares)	38,369	75,980	2,977	28,657
Shares of common stock for the exercise of stock options (in shares)	148,284	260,481	18,000	86,247
Dividends declared per common share (in dollars per share)		$ 0.21	$ 0.19	$ 0.19
Forfeitures of restricted common shares (in shares)	6,793
Shares of restricted common shares, net of (forfeitures) (in shares)				6,005