Investment and Mortgage-Backed Securities, Held to Maturity (Schedule of investment and mortgage-backed securities held to maturity) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, gross unrealized gains	$ 174,809	$ 577,005
Debt Securities, Held-to-maturity, Amortized Cost, before Other-than-temporary Impairment	22,060,506		$ 23,506,768
Held to maturity, gross unrealized losses	1,194,332	363,365
Debt Securities, Held-to-maturity, Fair Value	21,040,983		23,720,408
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	22,060,506		23,506,768
Held to maturity, gross unrealized gains	174,809	577,005
Held to maturity, gross unrealized losses	1,194,332	$ 363,365
Debt Securities, Held-to-maturity, Fair Value	$ 21,040,983		$ 23,720,408