Note 15 - Litigation (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
Dec. 31, 2011
Litigation Settlement, Gross	$ 0.2

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

No definition available.

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