Investment, HTM (Schedule of investment and mortgage-backed securities held to maturity) (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2023	Jun. 30, 2022	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 180,178,508		$ 167,437,616
Gross Unrealized Gains	864,006	$ 279,918
Gross Unrealized Losses	5,189,789	$ 6,253,961
Fair Value	175,852,725		161,463,573
US Treasury Bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	34,600,540		34,511,849
Gross Unrealized Gains	0		0
Gross Unrealized Losses	486,165		682,198
Fair Value	34,114,375		33,829,651
FHLB Bond
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,000,000		1,000,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	4,852		1,360
Fair Value	995,148		998,640
Student Loan Pools
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	18,494,187		16,387,997
Gross Unrealized Gains	100,836		88,489
Gross Unrealized Losses	67,488		59,090
Fair Value	18,527,535		16,417,396
SBA Bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	15,448,896		3,521,293
Gross Unrealized Gains	716,125		162,235
Gross Unrealized Losses	0		0
Fair Value	16,165,021		3,683,528
Taxable Municipal Bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	954,460		951,864
Gross Unrealized Gains	0		0
Gross Unrealized Losses	42,860		60,134
Fair Value	911,600		891,730
MBS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	109,680,425		111,064,613
Gross Unrealized Gains	47,045		29,194
Gross Unrealized Losses	4,588,424		5,451,179
Fair Value	$ 105,139,046		$ 105,642,628