Note 13 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Effective Income Tax Rate Reconciliation, Percent, Total	28.00%	27.00%	34.00%	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			2.00%	1.00%
Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent			6.00%
Income Taxes Paid, Net, Total			$ 12	$ 27
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 564		564
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	776		776
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 837		$ 837