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Note 12 - Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

(Dollars in millions)																		Minimum Required To Be
										Minimum Required For								Well Capitalized Under Prompt
		Actual								Capital Adequacy Purposes								Corrective Action Regulations
December 31, 2023		Amount				Ratio				Amount				Ratio				Amount				Ratio
Common equity tier 1 capital to risk-weighted assets		$	168.3				10.4	%		$	72.6				4.5	%		$	104.9				6.5	%
Tier 1 capital to risk-weighted assets		$	168.3				10.4	%		$	96.9				6.0	%		$	129.1				8.0	%
Total capital to risk-weighted assets		$	183.3				11.4	%		$	129.1				8.0	%		$	161.4				10.0	%
Tier 1 capital to adjusted average assets		$	168.3				7.8	%		$	86.6				4.0	%		$	108.2				5.0	%

(Dollars in millions)																		Minimum Required To Be
										Minimum Required For								Well Capitalized Under Prompt
		Actual								Capital Adequacy Purposes								Corrective Action Regulations
December 31, 2022		Amount				Ratio				Amount				Ratio				Amount				Ratio
Common equity tier 1 capital to risk-weighted assets		$	161.3				10.1	%		$	71.6				4.5	%		$	103.4				6.5	%
Tier 1 capital to risk-weighted assets		$	161.3				10.1	%		$	95.5				6.0	%		$	127.3				8.0	%
Total capital to risk-weighted assets		$	174.2				10.9	%		$	127.3				8.0	%		$	159.1				10.0	%
Tier 1 capital to adjusted average assets		$	161.3				7.7	%		$	84.3				4.0	%		$	105.4				5.0	%

X

- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480696/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B

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X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration