Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,547	$ 2,052	$ 4,521	$ 5,248
Other comprehensive income, net of tax:
Change in fair value of securities available for sale, net of tax, $9, $(100), $(571) and $(619), respectively	(34)	374	2,147	2,328
Reclassification adjustment for gains on securities available for sale, net of tax, $0, $0, $0 and $17, respectively				(62)
Change in fair value of interest rate swap, net of tax, $(11), $37, $93 and $98, respectively	45	(141)	(348)	(369)
Total other comprehensive income, net of tax, $(2), $(63), $(478) and $(504), respectively	11	233	1,799	1,897
Total comprehensive income	$ 1,558	$ 2,285	$ 6,320	$ 7,145