Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018	5,137,476
Balance at Dec. 31, 2018	$ 6,944	$ 62,005	$ (2,017)	$ 66,932
Net income		11,630		11,630
Other comprehensive income (loss)			4,150	4,150
Cash dividends on common stock		(1,186)		(1,186)
Exercise of stock options and tax effect (in shares)	22,084
Exercise of stock options and tax effect	$ 103			103
Stock-based compensation expense	$ 150			150
Balance (in shares) at Sep. 30, 2019	5,159,560
Balance at Sep. 30, 2019	$ 7,197	72,449	2,133	81,779
Balance (in shares) at Dec. 31, 2019	5,165,760
Balance at Dec. 31, 2019	$ 7,312	75,144	2,049	84,505
Net income		10,193		10,193
Other comprehensive income (loss)			2,254	2,254
Cash dividends on common stock		(1,243)		(1,243)
Exercise of stock options and tax effect (in shares)	15,272
Exercise of stock options and tax effect	$ 79			79
Stock-based compensation expense	$ 195			195
Balance (in shares) at Sep. 30, 2020	5,181,032
Balance at Sep. 30, 2020	$ 7,586	$ 84,094	$ 4,303	$ 95,983