Note 1 - General (Details Textual) $ in Millions	9 Months Ended
Sep. 30, 2016 USD ($)
December 31, 2015 [Member] \| Reclassification from Other Liabilities to Surplus [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