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Note 4 - Loans Receivable - Loans Individually Evaluated for Impairment By Class (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Loan balance, with no allowance recorded | $ 2,831 | $ 2,160
Recorded investment, with no allowance recorded | 2,705 | 2,170
Partial charge-off, with no allowance recorded | 49 | 14
Average investment in impaired loans, with no allowance recorded | 2,178 | 2,285
Interest income recognized, with no allowance recorded | 103 | 59
Loan balance |  | 1,880
Recorded investment |  | 1,873
Partial charge-off |  | 7
Average investment in impaired loans |  | 1,989
Allowance for loan losses | 0 | 30
Nonresidential Real Estate Loans [Member] |  |
Interest income recognized, with no allowance recorded |  | 0
Loan balance, with allowance recorded |  | 280
Recorded investment, with allowance recorded |  | 297
Partial charge-off, with allowance recorded |  | 7
Allowance for loan losses |  | 30
Average investment in impaired loans, with allowance recorded |  | 296
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member] |  |
Loan balance, with no allowance recorded | 752 | 1,299
Recorded investment, with no allowance recorded | 751 | 1,299
Partial charge-off, with no allowance recorded | 0 | 0
Average investment in impaired loans, with no allowance recorded | 1,143 | 1,473
Interest income recognized, with no allowance recorded | 29 | 29
Allowance for loan losses | 0 | 0
Real Estate Portfolio [Member] | Multi-family Mortgage [Member] |  |
Allowance for loan losses | 0 | 0
Real Estate Portfolio [Member] | Multi-family Mortgage [Member] | ILLINOIS |  |
Loan balance, with no allowance recorded | 473 |
Recorded investment, with no allowance recorded | 473 |
Average investment in impaired loans, with no allowance recorded | 590 |
Interest income recognized, with no allowance recorded | 27 |
Real Estate Portfolio [Member] | Commercial leases [Member] |  |
Loan balance, with no allowance recorded | 1,606 | 83
Recorded investment, with no allowance recorded | 1,481 | 76
Partial charge-off, with no allowance recorded | 49 | 7
Average investment in impaired loans, with no allowance recorded | 445 | 7
Interest income recognized, with no allowance recorded | 47 | 0
Commercial Portfolio Segment [Member] |  |
Allowance for loan losses | $ 0 | 0
Commercial Portfolio Segment [Member] | Other [Member] |  |
Loan balance, with no allowance recorded |  | 498
Recorded investment, with no allowance recorded |  | 498
Partial charge-off, with no allowance recorded |  | 0
Average investment in impaired loans, with no allowance recorded |  | 509
Interest income recognized, with no allowance recorded |  | $ 30

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