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Note 5 - Fair Value Measurements - Fair Value Quantitative Information (Details) - Fair Value, Nonrecurring [Member] $ in Thousands | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Loans receivable | $ 8,991 | $ 9,012
Loans receivable | 8,991 | 9,012
Other real estate owned |  | 218
Fair Value, Inputs, Level 3 [Member] |  |
Loans receivable | 8,991 | 9,012
Loans receivable | 8,991 | 9,012
Other real estate owned |  | 218
Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] |  |
Loans receivable | 8,991 | 9,012
Loans receivable | $ 8,991 | 9,012
Appraisal Valuation [Member] | Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] |  |
Other real estate owned |  | $ 218
Appraisal Valuation [Member] | Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member] |  |
Other real estate owned |  | 6
Appraisal Valuation [Member] | Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member] |  |
Other real estate owned |  | 8
Appraisal Valuation [Member] | Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] | Weighted Average [Member] | Measurement Input, Discount Rate [Member] |  |
Other real estate owned |  | (7)

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- Definition Fair value portion of assets classified as held for sale. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI https://asc.fasb.org/subtopic&trid=2196772 + Details
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- Definition Value of input used to measure real estate owned by financial institution by financial institution which is not directly related to its business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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