Merger - Summary of Proforma Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition, Pro Forma Information [Abstract]
Net interest income	$ 28,075	$ 23,392
Non-interest income	2,551	2,403
Net income (loss)	$ 8,159	$ 4,387
Basic earnings (loss) per common share	$ 0.83	$ 0.47
Diluted earnings (loss) per common share	$ 0.80	$ 0.46