Note 2 - Basis of Presentation (Details Textual) $ in Millions	3 Months Ended
Mar. 31, 2016 USD ($)
General and Administrative Expense [Member] \| Three Months Ended March 31, 2015 [Member] \| Reclassification from Loss (Gain ) to General and Administrative Expense [Member]
Prior Period Reclassification Adjustment	$ 0.7

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