CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - $ / shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Cash dividends declared per common share (in dollars per share)	$ 0.06			$ 0.06
Common Stock [Member]
Cash dividends declared per common share (in dollars per share)	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06
Repurchase and cancellation of common stock as a result of share repurchase program (in shares)			100,932
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan (in shares)	6,310	16,413	5,553	5,674	11,346	4,446
Issuance of shares of common stock as s result of stock options exercised (in shares)	1,123	975	31,729	12,438	2,414	25,238
Restricted stock awards (in shares)			10,300		4,769	12,719
Exchange of shares of common stock in connection with stock options exercised and restricted stock vested (in shares)	5,687	513	1,012	589	1,032	5,169