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v3.21.1

Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual) |  | 12 Months Ended |
--- | --- | --- | ---
May 10, 2019 USD ($) | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Total |  | $ 7,300,000 | $ 7,400,000 |  |
Impairment of Investment in Federal Home Loan Bank Stock and Federal Reserve Bank Stock |  | 0 | 0 |  |
SBA Loan Funds |  | 4,500,000 | 4,500,000 |  |
Financing Receivable, Credit Loss, Expense (Reversal) |  | 2,170,000 | 4,971,000 | $ 1,303,000 |
Deferred Tax Assets, Valuation Allowance, Total |  | 1,937,000 |  |  |
Deferred Tax Assets, Net, Total |  | 11,496,000 | 11,133,000 |  |
Unrecognized Tax Benefits, Ending Balance |  | 0 | 1,220,000 | 1,132,000 |
Goodwill, Purchase Accounting Adjustments |  |  | $ (621,000) |  |
Prime Bank [Member] |  |  |  |  |
Goodwill, Purchase Accounting Adjustments | $ (621,000) |  |  |  |
Prime Bank [Member] | Project Expenses [Member] |  |  |  |  |
Goodwill, Purchase Accounting Adjustments |  | $ 556,000 |  |  |
Vesting Period One [Member] | Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  | 3 years |  |  |
Vesting Period Two [Member] | Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  | 4 years |  |  |
Vesting Period Three [Member] | Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  | 5 years |  |  |
Core Deposits [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 10 years |  |  |
Minimum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  | 3 years |  |  |
Maximum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  | 40 years |  |  |
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] |  |  |  |  |
Stock Value Par or Stated Value per Share (in dollars per share) | $ / shares |  | $ 100 |  |  |
CONNECTICUT |  |  |  |  |
Number of Operating Branches |  | 7 |  |  |
NEW YORK |  |  |  |  |
Number of Operating Branches |  | 2 |  |  |

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