Note 14 - Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Sinsin Renewable Investment Limited [Member]
Note 14 - Other Liabilities (Details) [Line Items]
Business Combination, Contingent Consideration, Liability, Current	$ 29,850
Xinte [Member]
Note 14 - Other Liabilities (Details) [Line Items]
Business Combination, Contingent Consideration, Liability, Current	$ 3,701

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

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