Parent Company Only Condensed Financial Information - Schedule of Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income	$ 289	$ 4,193
Adjustments:
Net cash provided by operating activities	4,774	3,128
INVESTING ACTIVITIES
Net cash acquired through merger and acquisition	39,885	0
Net cash used for investing activities	(5,045)	(38,819)
FINANCING ACTIVITIES
Issuance of shares from exercise of stock options	120	0
Dividends paid	(1,462)	(1,433)
Net cash (used in) provided by financing activities	(10,301)	41,145
(Decrease) increase in cash and cash equivalents	(10,572)	5,454
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	33,162	27,708
CASH AND CASH EQUIVALENTS AT END OF PERIOD	22,590	33,162
Parent Company [Member]
OPERATING ACTIVITIES
Net income	289	4,193
Adjustments:
Undistributed earnings of subsidiaries	(391)	(3,007)
Other, net	(72)	6
Net cash provided by operating activities	(174)	1,192
INVESTING ACTIVITIES
Net cash acquired through merger and acquisition	(3,080)
Investments in subsidiaries	(1,300)
Net cash used for investing activities	1,780
FINANCING ACTIVITIES
Issuance of shares from exercise of stock options	120
Dividends paid	1,462	1,433
Net cash (used in) provided by financing activities	(1,342)	(1,433)
(Decrease) increase in cash and cash equivalents	264	(241)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	12	253
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 276	$ 12