Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2022

Disclosure Text Block [Abstract]

Schedule of Regulatory Capital Ratio Requirments under Banking Regulations [Table Text Block]

The Basel III minimum capital ratio requirements and additional capital conservation buffers as applicable to the Company and the Bank as of September 30, 2022 are summarized in the table below.

	BASEL III Minimum for Capital Adequacy Requirements			BASEL III Additional Capital Conservation Buffer			BASEL III Ratio with Capital Conservation Buffer
Total Risk Based Capital (total capital to risk weighted assets)		8.0	%		2.5	%		10.5	%
Tier 1 Risk Based Capital (tier 1 to risk weighted assets)		6.0	%		2.5	%		8.5	%
Common Equity Tier 1 Risk Based ( CET1 to risk weighted assets)		4.5	%		2.5	%		7.0	%
Tier 1 Leverage Ratio (tier 1 to average assets)		4.0	%		-	%		4.0	%

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

The regulatory capital ratios of the Company and the Bank are as follows:

	Actual					Minimum Capital Required - Basel III					Required to be Considered Well Capitalized
(In thousands, except percentages)	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of September 30, 2022
Total Capital (to Risk Weighted Assets)
Tectonic Financial, Inc. (consolidated)	$	78,129		20.59	%	$	39,849		10.50	%	$	37,952		10.00	%
T Bank, N.A.		78,062		20.78			39,444		10.50			37,566		10.00
Tier 1 Capital (to Risk Weighted Assets)
Tectonic Financial, Inc. (consolidated)		73,959		19.49			32,259		8.50			30,362		8.00
T Bank, N.A.		73,893		19.67			31,931		8.50			30,053		8.00
Common Equity Tier 1 (to Risk Weighted Assets)
Tectonic Financial, Inc. (consolidated)		56,709		14.94			26,566		7.00			24,669		6.50
T Bank, N.A.		73,893		19.67			26,296		7.00			24,418		6.50
Tier 1 Capital (to Average Assets)
Tectonic Financial, Inc. (consolidated)		73,959		12.92			22,895		4.00			28,619		5.00
T Bank, N.A.		73,893		13.12			22,522		4.00			28,152		5.00
As of December 31, 2021
Total Capital (to Risk Weighted Assets)
Tectonic Financial, Inc. (consolidated)	$	66,946		18.55	%	$	37,894		10.50	%	$	36,089		10.00	%
T Bank, N.A.		67,454		18.87			37,542		10.50			35,754		10.00
Tier 1 Capital (to Risk Weighted Assets)
Tectonic Financial, Inc. (consolidated)		62,794		17.40			30,676		8.50			28,871		8.00
T Bank, N.A.		63,302		17.70			30,391		8.50			28,604		8.00
Common Equity Tier 1 (to Risk Weighted Assets)
Tectonic Financial, Inc. (consolidated)		45,544		12.62			25,263		7.00			23,458		6.50
T Bank, N.A.		63,302		17.70			25,028		7.00			23,240		6.50
Tier 1 Capital (to Average Assets)
Tectonic Financial, Inc. (consolidated)		62,794		11.82			21,245		4.00			26,557		5.00
T Bank, N.A.		63,302		12.06			21,002		4.00			26,252		5.00