Note 15 - Employee Equity Incentive Plans (Details) - Vested Shares (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Vested Shares [Abstract]
Number of options vested	695,834	768,833
Fair value of options vested	$ 84,450	$ 81,391

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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)

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

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