Available for Sale Securities - Summary of Amortized Costs and Fair Value of Securities Available-for-sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	$ 112,246	$ 57,145
Securities Available for Sale, Gross Unrealized Gains	888	1,588
Securities Available for Sale, Gross Unrealized Losses	(694)	(30)
Securities Available for Sale, Fair Value	112,440	58,703
US Treasury Securities [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	19,501
Securities Available for Sale, Gross Unrealized Gains	8
Securities Available for Sale, Gross Unrealized Losses	(25)
Securities Available for Sale, Fair Value	19,484
Obligations of states and political subdivisions [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	20,758	11,570
Securities Available for Sale, Gross Unrealized Gains	207	244
Securities Available for Sale, Gross Unrealized Losses	(205)	(11)
Securities Available for Sale, Fair Value	20,760	11,803
Government-sponsored Mortgage-backed Securities [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	64,049	36,886
Securities Available for Sale, Gross Unrealized Gains	563	1,165
Securities Available for Sale, Gross Unrealized Losses	(463)	(12)
Securities Available for Sale, Fair Value	64,149	38,039
Asset-backed securities [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	6,479	7,231
Securities Available for Sale, Gross Unrealized Gains	45	57
Securities Available for Sale, Gross Unrealized Losses	(1)	(7)
Securities Available for Sale, Fair Value	6,523	7,281
Certificates of deposit [Member]
Marketable Securities [Line Items]
Securities Available for Sale, Amortized Cost	1,459	1,458
Securities Available for Sale, Gross Unrealized Gains	65	122
Securities Available for Sale, Fair Value	$ 1,524	$ 1,580