Note 2 - Investments (Details) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2014 Certificates of Deposit [Member]	Dec. 31, 2013 Certificates of Deposit [Member]
Note 2 - Investments (Details) [Line Items]
Assets, Fair Value Disclosure		$ 2,000,000	$ 2,000,000
Available-for-sale Securities, Gross Realized Gains	$ 0

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563

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