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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	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($)
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		$ 8,400	$ 7,700
Impairment of Investment in Federal Home Loan Bank Stock and Federal Reserve Bank Stock		0	0
SBA Loan Funds		$ 4,500	4,500
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 2,800
Deferred Tax Assets, Valuation Allowance		0	0
Deferred Tax Assets, Net of Valuation Allowance		10,397	12,632
Unrecognized Tax Benefits		$ 0	$ 0
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
Vesting Period One [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Open Tax Year		2015
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Open Tax Year		2017
State and Local Jurisdiction [Member] | Connecticut [Member] | Earliest Tax Year [Member]
Open Tax Year		2015
State and Local Jurisdiction [Member] | Connecticut [Member] | Latest Tax Year [Member]
Open Tax Year		2017
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] | Earliest Tax Year [Member]
Open Tax Year		2015
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] | Latest Tax Year [Member]
Open Tax Year		2017
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
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 [Member]
Number of Operating Branches		7
New York [Member]
Number of Operating Branches		2

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