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Note 14 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Percent, Total   1.60% 8.10% 24.20%  
Deferred Tax Assets, Valuation Allowance, Total $ (0) $ (0) $ 1,937    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (1,900) (1,900)      
Unrecognized Tax Benefits, Ending Balance 0 $ 0 $ 0 $ 1,220 $ 1,132
Open Tax Year   2018 2019 2020 2021      
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]          
Operating Loss Carryforwards, Including Limitation Amount 17,200 $ 17,200      
Operating Loss Carryforwards, Limitation Amount 15,500 15,500      
Operating Loss Carryforwards, Total 17,200 17,200      
Operating Loss Carryforwards, Subject to Expiration 15,800 15,800      
Operating Loss Carryforwards, Not Subject to Expiration 1,400 $ 1,400      
Open Tax Year   2018 2019 2020 2021      
State and Local Jurisdiction [Member] | Department of Revenue Services for the State of Connecticut [Member]          
Operating Loss Carryforwards, Total $ 53,500 $ 53,500      
Operating Loss Carryforwards, Maximum Percentage of Taxable Income Per Year Allowed to be Offset by NOLs   50.00%      
Open Tax Year   2018 2019 2020 2021      
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member]          
Open Tax Year   2018 2019 2020 2021