The amortized cost and estimated fair value of investment securities available for sale at December 31, 2021 and 2020, by contractual maturity are in the following table. (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, amortized cost	$ 12,756,176	$ 32,245,646
Due in one year or less, estimated fair value	12,859,086	32,622,890
Due in one year to five years, amortized cost	116,602,790	40,022,194
Due in one year to five years, estimated fair value	115,896,465	41,258,370
Due in one year to five years, amortized cost	76,531,464	50,438,223
Due in five years to ten years, estimated fair value	74,575,862	50,968,288
Due in ten years and over, amortized cost	9,157,021	10,000,000
Due in ten years and over, estimated fair value	9,016,076	9,970,270
Total, amortized cost	215,047,451	132,706,063
Total, estimated fair value	$ 212,347,489	$ 134,819,818