Note 15 - Fair Value Measurement - Quantitative Information (Details) $ in Thousands		Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Servicing rights on sold loans, at fair value		$ 3,014	$ 3,281
Fair Value, Recurring [Member]
Servicing rights on sold loans, at fair value		3,014	3,281
Assets, fair value		273,324	343,892
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Servicing rights on sold loans, at fair value		3,014	3,281	$ 3,793
Assets, fair value		9,613	$ 35,162
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Consensus Pricing Model [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Assets, fair value		6,599
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Sold Loan Servicing Rights [Member] | Valuation Technique, Discounted Cash Flow [Member]
Servicing rights on sold loans, at fair value		$ 3,014
Fair Value, Recurring [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Sold Loan Servicing Rights [Member] | Valuation Technique, Discounted Cash Flow [Member]
Sold loan servicing rights, measurement input		0.1099
Measurement Input, Discount Rate [Member] | Fair Value, Recurring [Member]
Fair value		$ 1,380
Measurement Input, Discount Rate [Member] | Fair Value, Recurring [Member] | Minimum [Member]
measurement input		0
Measurement Input, Discount Rate [Member] | Fair Value, Recurring [Member] | Weighted Average [Member]
measurement input		0.05
Measurement Input, Discount Rate [Member] | Fair Value, Recurring [Member] | Maximum [Member]
measurement input	[1]	0.10
Measurement Input, Constant Prepayment Rate [Member] | Fair Value, Recurring [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Sold Loan Servicing Rights [Member] | Valuation Technique, Discounted Cash Flow [Member]
Sold loan servicing rights, measurement input		0.0588
Measurement Input, Quoted Price [Member] | Fair Value, Recurring [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Consensus Pricing Model [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Measurement input		99
Measurement Input, Quoted Price [Member] | Fair Value, Recurring [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Consensus Pricing Model [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Measurement input		100.4

[1] Discount to appraisal disposition value.