Fair Value Measurements - Summary of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets:
US Government Agency securities	$ 12,985
US Government Treasury securities	4,942
Small Business Administration loan pools		$ 843
Obligations of state and political subdivisions	47,045	40,169
Mortgage backed securities in government-sponsored entities	48,181	37,801
Other securities	2,337
Total	115,490	78,813
Fair Value, Inputs, Level 1 [Member]
Assets:
US Government Agency securities	0
US Government Treasury securities	0
Small Business Administration loan pools		0
Obligations of state and political subdivisions	0	0
Mortgage backed securities in government-sponsored entities	0	0
Other securities	0
Total	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
US Government Agency securities	12,985
US Government Treasury securities	4,942
Small Business Administration loan pools		843
Obligations of state and political subdivisions	47,045	40,169
Mortgage backed securities in government-sponsored entities	48,181	37,801
Other securities	2,337
Total	115,490	78,813
Fair Value, Inputs, Level 3 [Member]
Assets:
US Government Agency securities	0
US Government Treasury securities	0
Small Business Administration loan pools		0
Obligations of state and political subdivisions	0	0
Mortgage backed securities in government-sponsored entities	0	0
Total	$ 0	$ 0