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Note 4 - Income Taxes (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits, Period Increase (Decrease), Total	$ 0.8
Deferred Tax Liabilities, Net, Total	81.4
Deferred Tax Assets Related to State Net Operating Loss Carry Forwards [Member]
Deferred Tax Assets, Valuation Allowance, Total	$ 0.1

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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-SubTopic 10
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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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