Note 16 - Stockholder Rights Plan (Detail) (Rights [Member], USD $)	3 Months Ended
Mar. 31, 2013
Rights [Member]
Investment Warrants, Exercise Price	$ 12.00
Sale of Stock, Price Per Share	$ 24.00

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant