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Note 4 - Allowance for Loan Losses (Details Textual) $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Apr. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($)
Financing Receivable, Troubled Debt Restructuring |  | $ 350 |  | $ 360
Financing Receivable, Deferred Payments |  | 61,600 |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | $ 0 | $ 0 |
Subsequent Event [Member] |  |  |  |
Financing Receivable, Deferred Payments | $ 171,000 |  |  |
Financing Receivable, Deferred Payments During the Period | $ 109,400 |  |  |
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |
Financing Receivable, Modifications, Number of Contracts |  | 1 |  |
Performing Financial Instruments [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring |  | $ 0 |  | $ 0

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- Definition Deferred amounts on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19. + References No definition available. + Details
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- Definition Amounts deferred during the period on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524 + Details
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