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Note 4 - Loans Receivable and Allowance for Credit Losses - Summary of Allowance for Credit Losses of Financing Receivables (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Financing receivable, allowance for credit losses, balance | $ 34,649 | $ 32,573 | $ 32,573
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 |
Financing receivable, allowance for credit losses, recoveries | 2 | 1 |
Financing receivable, allowance for credit losses, provision (benefit) | 269 | 517 |
Financing receivable, allowance for credit losses, balance | 34,921 | 33,091 | 34,649
Commercial Portfolio Segment [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 1,008 | 1,097 | 1,097
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | 0
Financing receivable, allowance for credit losses, recoveries | 2 | 1 |
Financing receivable, allowance for credit losses, provision (benefit) | 21 | (50) |
Financing receivable, allowance for credit losses, balance | 1,032 | 1,048 | 1,008
Construction Portfolio Segment [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 4,032 | 3,037 | 3,037
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | 0
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | (137) | (762) |
Financing receivable, allowance for credit losses, balance | 3,895 | 2,275 | 4,032
Real Estate Portfolio Segment [Member] | Mortgage on Commercial Property Occupied by Owner [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 2,239 | 1,871 | 1,871
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | 0
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | (25) | 599 |
Financing receivable, allowance for credit losses, balance | 2,214 | 2,470 | 2,239
Real Estate Portfolio Segment [Member] | Mortgage on Commercial Property Occupied by Non Owners [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 9,661 | 6,300 | 6,300
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | (202)
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | (436) | 1,061 |
Financing receivable, allowance for credit losses, balance | 9,225 | 7,361 | 9,661
Real Estate Portfolio Segment [Member] | Mortgage on Residential Properties Occupied by One to Four Families [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 8,205 | 9,166 | 9,166
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 |
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | (274) | (352) |
Financing receivable, allowance for credit losses, balance | 7,931 | 8,814 | 8,205
Real Estate Portfolio Segment [Member] | Mortgage on Residential Properties Occupied by One to Four Family Investment [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 7,601 | 8,832 | 8,832
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | 0
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | 526 | 23 |
Financing receivable, allowance for credit losses, balance | 8,127 | 8,855 | 7,601
Real Estate Portfolio Segment [Member] | Mortgage on Residential Properties Occupied by Multifamily [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 1,845 | 2,203 | 2,203
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | 0
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | 596 | (1) |
Financing receivable, allowance for credit losses, balance | 2,441 | 2,202 | 1,845
Consumer Portfolio Segment [Member] |  |  |
Financing receivable, allowance for credit losses, balance | 58 | 67 | 67
Financing receivable, allowance fore credit losses, charge-offs | 0 | 0 | 0
Financing receivable, allowance for credit losses, recoveries | 0 | 0 |
Financing receivable, allowance for credit losses, provision (benefit) | (2) | (1) |
Financing receivable, allowance for credit losses, balance | $ 56 | $ 66 | $ 58

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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