Note 3 - Business Combinations (Details) - Allocation of Purchase Price	12 Months Ended	0 Months Ended			0 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 01, 2014 Sinsin Renewable Investment Limited [Member] USD ($)	Dec. 01, 2014 Sinsin Renewable Investment Limited [Member] EUR (€)	Dec. 01, 2014 Sinsin Renewable Investment Limited [Member] USD ($)	Nov. 06, 2014 Gonghe County Photovoltaic Co. Ltd (Xinte) [Member] USD ($)	Nov. 06, 2014 Gonghe County Photovoltaic Co. Ltd (Xinte) [Member] CNY	Nov. 06, 2014 Gonghe County Photovoltaic Co. Ltd (Xinte) [Member] USD ($)
Identifiable assets acquired and liabilities assumed
Cash and cash equivalents				$ 958,000			$ 16,000
Accounts receivable				5,793,000			2,168,000
Other receivable				2,398,000			3,292,000
Prepaid expenses and other current assets							7,000
Property, plant and equipment				71,098,000			26,402,000
Land use rights							402,000
Long term receivables				14,000
Deferred tax assets				1,719,000			358,000
Accounts payable				(1,944,000)
Income tax payable				(381,000)			(325,000)
Others							(1,782,000)
Other accrued liabilities				(222,000)
Other long-term liability				(4,000)
Deferred tax liabilities				(4,859,000)
Identifiable net assets acquired				74,570,000			30,538,000
Cash Consideration	6,652,000	4,209,000	3,370,000		30,624,000
Payable Settlement		57,365,000
Stock Consideration				78,955,000
Total consideration (b)		140,529,000			6,919,000	43,000,000
Goodwill	$ 66,045,000			$ 65,959,000			$ 86,000