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Note 4 - Loans Receivable - Loans Individually Evaluated for Impairment By Class (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Loan balance, with no allowance recorded | $ 1,731 | $ 1,880
Recorded investment, with no allowance recorded | 1,723 | 1,873
Partial charge-off, with no allowance recorded | 9 | 7
Average investment in impaired loans, with no allowance recorded | 1,787 | 1,989
Interest income recognized, with no allowance recorded | 13 | 59
Loan balance, with no allowance recorded | 1,731 | 1,880
Recorded investment, with no allowance recorded | 1,723 | 1,873
Recorded investment, with no allowance recorded |  | 2,170
Partial charge-off, with no allowance recorded |  | 14
Allowance for loan losses |  | 30
Average investment in impaired loans, with no allowance recorded |  | 2,285
Interest income recognized, with no related allowance recorded |  | 59
Loan balance, with allowance recorded |  | 2,160
Nonresidential Real Estate Loans [Member] |  |
Loan balance, with allowance recorded |  | 280
Recorded investment, with no allowance recorded |  | 297
Partial charge-off, with no allowance recorded |  | 7
Allowance for loan losses |  | 30
Average investment in impaired loans, with no allowance recorded |  | 296
Interest income recognized, with no related allowance recorded |  | 0
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member] |  |
Loan balance, with no allowance recorded | 1,066 | 1,299
Recorded investment, with no allowance recorded | 1,067 | 1,299
Partial charge-off, with no allowance recorded | 0 | 0
Average investment in impaired loans, with no allowance recorded | 1,190 | 1,473
Interest income recognized, with no allowance recorded | 6 | 29
Loan balance, with no allowance recorded | 1,066 | 1,299
Recorded investment, with no allowance recorded | 1,067 | 1,299
Real Estate Portfolio [Member] | Multi-family Mortgage [Member] | ILLINOIS |  |
Loan balance, with no allowance recorded | 492 | 498
Recorded investment, with no allowance recorded | 492 | 498
Partial charge-off, with no allowance recorded | 0 | 0
Average investment in impaired loans, with no allowance recorded | 495 | 509
Interest income recognized, with no allowance recorded | 7 | 30
Loan balance, with no allowance recorded | 492 | 498
Recorded investment, with no allowance recorded | 492 | 498
Real Estate Portfolio [Member] | Commercial leases [Member] |  |
Loan balance, with no allowance recorded | 173 | 83
Recorded investment, with no allowance recorded | 164 | 76
Partial charge-off, with no allowance recorded | 9 | 7
Average investment in impaired loans, with no allowance recorded | 102 | 7
Interest income recognized, with no allowance recorded | 0 | 0
Loan balance, with no allowance recorded | 173 | 83
Recorded investment, with no allowance recorded | $ 164 | $ 76

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- Definition Amount of partial charge offs for impaired financing receivables for which there is no related allowance for credit losses + References No definition available. + Details
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- Definition Represents partial charge-offs with related allowance of impaired financing receavbel. + References No definition available. + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
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