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Note 2 - Securities (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)
Weighted Average Re-pricing Term (Year)	6 years 6 months	5 years 2 months 12 days
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale, Total	$ 39,100	$ 54,551
Debt Securities, Available-for-Sale, Realized Gain (Loss), Total	(2,000)	37,000
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities	9,300	4,700
Debt Securities, Available-for-Sale, Restricted	134,500	83,800
Debt Securities, Available-for-Sale, Amortized Cost, Total	186,826	290,058	$ 82,200
Debt Securities, Available-for-Sale, Unrealized Loss			7,800
Debt Securities, Available-for-Sale, Total	162,907	289,495	$ 74,400
Impairment Losses Related to Federal Home Loan Stock	0
Other Assets [Member]
Equity Securities without Readily Determinable Fair Value, Amount	$ 599	$ 504
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	107	37
Available-for-Sale Securities, Number of Securities	116	118
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	1
Available-for-Sale Securities, Number of Securities	1
US Agency and Mortgage-backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions		58
Available-for-Sale Securities, Number of Securities		135
US Treasury Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	11	6
Available-for-Sale Securities, Number of Securities	11	8
Debt Securities, Available-for-Sale, Amortized Cost, Total	$ 12,469	$ 39,871
Debt Securities, Available-for-Sale, Total	$ 11,229	$ 39,658
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	126
Available-for-Sale Securities, Number of Securities	143

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