Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, before Allowance for Credit Loss	$ 848,975	$ 852,744
Collateral Pledged [Member]
Financing Receivable, before Allowance for Credit Loss	7
Closed End First Liens [Member] \| Consumer Real Estate Portfolio Segment [Member] \| Collateral Pledged [Member]
Financing Receivable, before Allowance for Credit Loss	7
Loans Held-for-sale [Member] \| Changes Measurement [Member] \| Fair Value, Nonrecurring [Member]
Assets, Fair Value Adjustment	$ 0	$ 0

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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+ Details