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Note 2 - Business Combinations - Identifiable Assets Acquired and Liabilities Assumed (Details) (Parentheticals)	3 Months Ended	9 Months Ended
	Sep. 30, 2024 $ / shares shares	Sep. 30, 2024 $ / shares shares
Cincinnati Bancorp, Inc. [Member]
Shares issued (in shares) | shares		2,042,598
Price per share (in dollars per share) | $ / shares	$ 13.99	$ 13.99
Shares issued (in shares) | shares		2,042,598
Price per share (in dollars per share) | $ / shares	$ 13.99	$ 13.99
Eagle Financial Bancorp, Inc. [Member]
Shares issued (in shares) | shares	918,128
Price per share (in dollars per share) | $ / shares	$ 14.04	14.04
Shares issued (in shares) | shares	918,128
Price per share (in dollars per share) | $ / shares	$ 14.04	$ 14.04

X

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

+ Details

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X

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- Details

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Namespace Prefix:
Data Type:	na
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X

- Details

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Namespace Prefix:
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Period Type: