Fair Value - Fair Value Measurements, by Fair Value hierarchy (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Estimated Fair Value	$ 209,554,380	$ 261,601,925
Corporate securities
Estimated Fair Value	343,925	418,548
Obligations of states and political subdivisions
Estimated Fair Value	209,210,455	261,183,377
Quoted Prices In Active Markets for Identical Assets (Level1)
Estimated Fair Value	343,925	418,548
Quoted Prices In Active Markets for Identical Assets (Level1) | Corporate securities
Estimated Fair Value	343,925	418,548
Quoted Prices In Active Markets for Identical Assets (Level1) | Obligations of states and political subdivisions
Estimated Fair Value	0	0
Significant Other Observable Inputs (Level2)
Estimated Fair Value	209,210,455	261,183,377
Significant Other Observable Inputs (Level2) | Corporate securities
Estimated Fair Value	0	0
Significant Other Observable Inputs (Level2) | Obligations of states and political subdivisions
Estimated Fair Value	209,210,455	261,183,377
Significant Unobservable Inputs (Level3)
Estimated Fair Value	0	0
Significant Unobservable Inputs (Level3) | Corporate securities
Estimated Fair Value	0	0
Significant Unobservable Inputs (Level3) | Obligations of states and political subdivisions
Estimated Fair Value	$ 0	$ 0