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Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) $ / shares | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 01, 2019 USD ($)
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Total | $ 7,800 | $ 8,400 |  |
Impairment of Investment in Federal Home Loan Bank Stock and Federal Reserve Bank Stock | 0 | 0 |  |
SBA Loan Funds | 4,500 | 4,500 |  |
Provision for Loan Losses Expensed | 1,303 | $ (857) | $ 2,464 |
Goodwill, Impaired, Accumulated Impairment Loss | $ 0 |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 35.00% |  |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | $ 2,800 |  |
Deferred Tax Assets, Valuation Allowance, Total | $ 0 | 0 |  |
Deferred Tax Assets, Net of Valuation Allowance, Total | 10,851 | 10,397 |  |
Unrecognized Tax Benefits, Ending Balance | $ 1,132 | $ 0 |  |
Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member] |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  | $ 3,400
Operating Lease, Liability, Total |  |  |  | $ 3,400
Vesting Period Two [Member] | Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |  |
Vesting Period Three [Member] | Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |  |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |
Open Tax Year | 2015 2016 2017 | 2015 2016 2017 |  |
Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |  |
Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |  |
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] |  |  |  |
Stock Value Par or Stated Value per Share | $ / shares | $ 100 |  |  |
CONNECTICUT |  |  |  |
Number of Operating Branches | 7 |  |  |
NEW YORK |  |  |  |
Number of Operating Branches | 2 |  |  |

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