Note 11 - Stock-based Compensation (Detail) - Restricted Stock Awards (Restricted Stock [Member])					3 Months Ended
Dec. 31, 2012 Beginning of Period [Member]	Dec. 31, 2011 Beginning of Period [Member]	Mar. 31, 2013 End of Period [Member]	Mar. 31, 2012 End of Period [Member]	Mar. 31, 2013	Mar. 31, 2012
Restricted stock units	1,325,868	925,868	1,325,868	925,868
Granted					0	0
Forfeited					0	0
Restricted stock units	1,325,868	925,868	1,325,868	925,868

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration