Note 13 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Effective Income Tax Rate Reconciliation, Percent, Total	29.00%	27.00%	45.00%	26.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent			5.00%	5.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent, Total			3.00%	1.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent			1.00%	1.00%
Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent			17.00%
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 770		$ 770
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 858		$ 858

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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