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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Percent, Total	21.80%	41.10%	38.50%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 2,800
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	$ (500)	(2,774)
Deferred Tax Assets, Valuation Allowance, Total	0	0
Unrecognized Tax Benefits, Ending Balance	1,132	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 19,600
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2015 2016 2017	2015 2016 2017
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 51,600
State and Local Jurisdiction [Member] | Connecticut [Member]
Open Tax Year	2015 2016 2017
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member]
Open Tax Year	2015 2016 2017

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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