The amortized cost and estimated fair value of investment securities available for sale as of March 31, 2022 and December 31, 2021, by contractual maturity are in the following table. (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, amortized cost	$ 3,039,951	$ 12,756,176
Due in one year or less, estimated fair value	3,014,039	12,859,086
Due in one year to five years, amortized cost	184,453,829	116,602,790
Due in one year to five years, estimated fair value	177,328,263	115,896,465
Due in five years to ten years, amortized cost	76,428,538	76,531,464
Due in five years to ten years, estimated fair value	69,708,612	74,575,862
Due in ten years and over, amortized cost	8,898,444	9,157,021
Due in ten years and over, estimated fair value	7,855,390	9,016,076
Total, amortized cost	272,820,762	215,047,451
Total, estimated fair value	$ 257,906,304	$ 212,347,489