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Note 4 - Allowance for Loan Losses (Details Textual) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Financing Receivable, Troubled Debt Restructuring | $ 381 |  | $ 381 |  | $ 467
Financing Receivable, Modifications, Number of Contracts | 0 | 0 |  |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $ 0 | $ 0 | $ 0 | $ 0 |
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 |  | $ 264

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