Investment Securities - Summary Of Unrealized Losses and Estimated Fair Value (Detail) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items]
Total less than 12 months, Estimated Fair Value	$ 42,210,141	$ 33,343,802
Total less than 12 months, Unrealized Losses	3,292,060	485,311
Total more than 12 months, Estimated Fair Value	4,033,026	0
Total more than 12 months, Unrealized Losses	135,479	0
Total	46,243,167	33,343,802
Total	3,427,539	485,311
US treasuries [Member]
Debt Securities, Available-for-Sale [Line Items]
Total less than 12 months, Estimated Fair Value	9,545,974	5,104,004
Total less than 12 months, Unrealized Losses	581,984	25,271
Total more than 12 months, Estimated Fair Value	0	0
Total more than 12 months, Unrealized Losses	0	0
Mortgage-backed securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Total less than 12 months, Estimated Fair Value	9,337,475	6,389,012
Total less than 12 months, Unrealized Losses	619,629	100,143
Total more than 12 months, Estimated Fair Value	0	0
Total more than 12 months, Unrealized Losses	0	0
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Total less than 12 months, Estimated Fair Value	12,589,589	11,190,910
Total less than 12 months, Unrealized Losses	438,035	145,656
Total more than 12 months, Estimated Fair Value	4,033,026	0
Total more than 12 months, Unrealized Losses	135,479	0
Municipal bonds [Member]
Debt Securities, Available-for-Sale [Line Items]
Total less than 12 months, Estimated Fair Value	7,374,079	7,828,330
Total less than 12 months, Unrealized Losses	1,390,436	170,787
Total more than 12 months, Estimated Fair Value	0	0
Total more than 12 months, Unrealized Losses	0	0
Corporate obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Total less than 12 months, Estimated Fair Value	3,363,024	2,831,546
Total less than 12 months, Unrealized Losses	261,976	43,454
Total more than 12 months, Estimated Fair Value	0	0
Total more than 12 months, Unrealized Losses	$ 0	$ 0