Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (14)	$ 1,492
Other comprehensive income:
Unrealized holding gain on available-for-sale securities arising during the period	1,070	1,020
Deferred income tax expense on unrealized gain on available-for-sale securities	(225)	(214)
Reclassification of net gains on sales and calls of available-for-sale securities recognized in net income	26
Deferred income tax expense on realized gain on available-for-sale securities	(5)
Total other comprehensive income	866	806
Comprehensive income	$ 852	$ 2,298