Note 8 - Fair Value Measurements (Details) - Assets Measured at Fair Value Based on Significant Unobservable Information (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Mar. 31, 2014
Assets Measured at Fair Value Based on Significant Unobservable Information [Abstract]
Balance, beginning of period	$ 230	$ 219
Balance, end of period	219	219
Principal redemption	$ (11)

Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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