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)	Mar. 31, 2022 USD ($) Number	Dec. 31, 2021 USD ($) Number
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	94	37
Fair Value, less than 12 months	$ 199,253,059	$ 125,859,972
Gross Unrealized Losses, less than 12 months	$ (9,467,276)	$ (1,989,416)
Number of positions, 12 months or longer | Number	9	6
Fair Value, 12 months or longer	$ 52,150,289	$ 39,909,134
Gross Unrealized Losses, 12 months or longer	$ (5,461,253)	$ (1,390,429)
Number of positions | Number	103	43
Fair value	$ 251,403,348	$ 165,769,106
Gross Unrealized Losses	$ (14,928,529)	$ (3,379,845)
US Treasury Securities [Member]
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	22	15
Fair Value, less than 12 months	$ 158,707,410	$ 94,994,915
Gross Unrealized Losses, less than 12 months	$ (6,848,104)	$ (1,276,399)
Number of positions, 12 months or longer | Number	1
Fair Value, 12 months or longer	$ 4,878,905
Gross Unrealized Losses, 12 months or longer	$ (415,482)
Number of positions | Number	23	15
Fair value	$ 163,586,315	$ 94,994,915
Gross Unrealized Losses	$ (7,263,586)	$ (1,276,399)
US Government Corporations and Agencies Securities [Member]
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	2	3
Fair Value, less than 12 months	$ 9,324,550	$ 19,480,595
Gross Unrealized Losses, less than 12 months	$ (675,450)	$ (519,405)
Number of positions, 12 months or longer | Number	7	6
Fair Value, 12 months or longer	$ 46,293,814	$ 39,909,134
Gross Unrealized Losses, 12 months or longer	$ (4,953,100)	$ (1,390,429)
Number of positions | Number	9	9
Fair value	$ 55,618,364	$ 59,389,729
Gross Unrealized Losses	$ (5,628,550)	$ (1,909,834)
US States and Political Subdivisions Debt Securities [Member]
Marketable Securities [Line Items]
Number of positions, less than 12 months | Number	70	19
Fair Value, less than 12 months	$ 31,221,099	$ 11,384,462
Gross Unrealized Losses, less than 12 months	$ (1,943,722)	$ (193,612)
Number of positions, 12 months or longer | Number	1
Fair Value, 12 months or longer	$ 977,570
Gross Unrealized Losses, 12 months or longer	$ (92,671)
Number of positions | Number	71	19
Fair value	$ 32,198,669	$ 11,384,462
Gross Unrealized Losses	$ (2,036,393)	$ (193,612)