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Note 5 - Fair Value Measurements - Fair Value Quantitative Information (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Loans receivable | $ 268 | $ 304
Loans receivable | 268 | 304
Fair Value, Inputs, Level 3 [Member] |  |
Loans receivable | 268 | 304
Loans receivable | 268 | 304
Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] |  |
Loans receivable | 268 | 304
Loans receivable | $ 268 | $ 304

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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
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