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Note 4 - Loans Receivable - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Beginning balance | $ 7,751 | $ 7,632
Provision for (recovery of ) loan losses | (335) | 471
Loans charged off | (95) | (18)
Recoveries | 74 | 27
Total ending allowance balance | 7,395 | 8,112
Commercial Portfolio Segment [Member] |  |
Beginning balance | 1,536 | 2,065
Provision for (recovery of ) loan losses | (74) | (12)
Loans charged off | (86) | 0
Recoveries | 1 | 2
Total ending allowance balance | 1,377 | 2,055
Consumer Portfolio Segment [Member] |  |
Beginning balance | 54 | 40
Provision for (recovery of ) loan losses | 0 | 19
Loans charged off | (9) | (13)
Recoveries | 2 | 0
Total ending allowance balance | 47 | 46
One-to-Four Family Residential Real Estate [Member] | Real Estate Portfolio [Member] |  |
Beginning balance | 518 | 675
Provision for (recovery of ) loan losses | (113) | (1)
Loans charged off | 0 | (5)
Recoveries | 60 | 13
Total ending allowance balance | 465 | 682
Multi-family Mortgage [Member] | Real Estate Portfolio [Member] |  |
Beginning balance | 4,062 | 3,676
Provision for (recovery of ) loan losses | (171) | 181
Loans charged off | 0 | 0
Recoveries | 11 | 12
Total ending allowance balance | 3,902 | 3,869
Nonresidential Real Estate [Member] | Real Estate Portfolio [Member] |  |
Beginning balance | 1,569 | 1,176
Provision for (recovery of ) loan losses | 23 | 284
Loans charged off | 0 | 0
Recoveries | 0 | 0
Total ending allowance balance | 1,592 | $ 1,460
Construction and Land Loans [Member] |  |
Beginning balance | 12 |
Provision for (recovery of ) loan losses | 0 |
Loans charged off | 0 |
Recoveries | 0 |
Total ending allowance balance | $ 12 |

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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