Condensed Financial Statements of Parent Company - Condensed Statements of Cash Flow (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities
Net income	$ 1,760,413	$ 2,640,457
Adjustments to reconcile net income to net cash provided by (used in) operating activities
ESOP expense	240,250	265,937
Amortization of unearned compensation associated with restricted stock	465,072
Stock based compensation	361,493
Net cash provided by operating activities	4,417,614	3,947,675
Cash Flows from Investing Activities
Net cash used in investing activities	(69,620,760)	(33,176,024)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Proceeds from sale of common stock		48,983,500
Dividends	(497,387)	0
Purchase of common stock	(1,085,265)	0
Repurchase of stock for tax obligation on restricted shares	(82,685)	0
Stock offering expenses		(1,523,443)
Common stock purchased by ESOP	0	(3,918,680)
Net cash provided by financing activities	48,858,187	29,242,781
Net Change in Cash and Cash Equivalents	(16,344,959)	14,432
Parent Company
Cash Flows from Operating Activities
Net income	1,761,000	2,640,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Undistributed Net Income	(1,903,000)	(2,626,000)
ESOP expense	240,000	266,000
Amortization of unearned compensation associated with restricted stock	465,000	0
Stock based compensation	361,000	0
Decrease (increase) in other assets	93,000	(3,735,000)
Increase in other liabilities	316,000	28,000
Net cash provided by operating activities	1,333,000	(3,427,000)
Cash Flows from Investing Activities
Capital contribution to TC Federal Bank	(1,067,000)	(20,260,000)
Net cash used in investing activities	(1,067,000)	(20,260,000)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Proceeds from sale of common stock	0	48,984,000
Dividends	(497,000)	0
Purchase of common stock	(1,085,000)	0
Repurchase of stock for tax obligation on restricted shares	(83,000)	0
Stock offering expenses	0	(1,523,000)
Common stock purchased by ESOP	0	(3,919,000)
Net cash provided by financing activities	(1,665,000)	43,542,000
Net Change in Cash and Cash Equivalents	(1,399,000)	19,855,000
Cash and Cash Equivalents, Beginning of Period	19,855,000	0
Cash and Cash Equivalents, End of Period	$ 18,456,000	$ 19,855,000