Note 7 - Income Taxes - Effective Tax Rate (Details)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	34.00%	34.00%
State and local taxes	5.00%	6.00%	6.00%
Impact of Tax Act	5.00%	4.00%
Non-U.S. income tax at different rates	17.00%	(1.00%)
Domestic production activities deduction		(2.00%)	(1.00%)
Other, net		(3.00%)	(2.00%)
Effective rate	47.00%	38.00%	37.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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