Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Millions	3 Months Ended
Mar. 31, 2016 USD ($)
Reclassification of Deferred Tax Assets and Liabilities to Noncurrent Classification [Member] \| December 31, 2015 [Member]
Prior Period Reclassification Adjustment	$ 8

The amount of a reclassification adjustment made to prior period financial statement amounts.

No definition available.

Name:	us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration