Note 9 - Income Taxes (Details) - Unrecognized Tax Benefits (USD $) In Thousands, unless otherwise specified	36 Months Ended		12 Months Ended
Dec. 31, 2013	Mar. 31, 2011	Dec. 31, 2013 Tax [Member]	Dec. 31, 2012 Tax [Member]	Mar. 31, 2011 Tax [Member]
Note 9 - Income Taxes (Details) - Unrecognized Tax Benefits [Line Items]
Balance,		$ 449	$ 154	$ 266	$ 402
Reductions to tax positions of prior years	371		(88)	(112)
Balance,		$ 449	$ 66	$ 154	$ 402

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Name:	us-gaap_UnrecognizedTaxBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant