The tables below summarize gross unrealized losses on investment securities and the fair market value of the related securities, aggregated by investment category and length of time (Details)	Sep. 30, 2022 USD ($) Number	Dec. 31, 2021 USD ($) Number
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	68	37
Fair Value, less than 12 months	$ 143,112,057	$ 125,859,972
Gross Unrealized Losses, less than 12 months	$ (8,462,665)	$ (1,989,416)
Number of positions, 12 months or longer | Number	44	6
Fair Value, 12 months or longer	$ 126,119,552	$ 39,909,134
Gross Unrealized Losses, 12 months or longer	$ (19,772,152)	$ (1,390,429)
Number of positions | Number	112	43
Fair value	$ 269,231,609	$ 165,769,106
Gross Unrealized Losses	$ (28,234,817)	$ (3,379,845)
US Treasury Securities [Member]
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	13	15
Fair Value, less than 12 months	$ 103,560,555	$ 94,994,915
Gross Unrealized Losses, less than 12 months	$ (6,300,118)	$ (1,276,399)
Number of positions, 12 months or longer | Number	12
Fair Value, 12 months or longer	$ 63,752,545
Gross Unrealized Losses, 12 months or longer	$ (6,814,182)
Number of positions | Number	25	15
Fair value	$ 167,313,100	$ 94,994,915
Gross Unrealized Losses	$ (13,114,300)	$ (1,276,399)
US Government Corporations and Agencies Securities [Member]
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	1	3
Fair Value, less than 12 months	$ 4,921,565	$ 19,480,595
Gross Unrealized Losses, less than 12 months	$ (75,999)	$ (519,405)
Number of positions, 12 months or longer | Number	9	6
Fair Value, 12 months or longer	$ 50,419,588	$ 39,909,134
Gross Unrealized Losses, 12 months or longer	$ (10,721,722)	$ (1,390,429)
Number of positions | Number	10	9
Fair value	$ 55,341,153	$ 59,389,729
Gross Unrealized Losses	$ (10,797,721)	$ (1,909,834)
US States and Political Subdivisions Debt Securities [Member]
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	54	19
Fair Value, less than 12 months	$ 34,629,937	$ 11,384,462
Gross Unrealized Losses, less than 12 months	$ (2,086,548)	$ (193,612)
Number of positions, 12 months or longer | Number	23
Fair Value, 12 months or longer	$ 11,947,419
Gross Unrealized Losses, 12 months or longer	$ (2,236,248)
Number of positions | Number	77	19
Fair value	$ 46,577,356	$ 11,384,462
Gross Unrealized Losses	$ (4,322,796)	$ (193,612)