Note 3 - Legal Proceedings (Details) $ in Millions	1 Months Ended
Nov. 06, 2015 USD ($)
Subsequent Event [Member]
Note 3 - Legal Proceedings (Details) [Line Items]
Litigation Settlement, Amount	$ 2.6

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

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