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Note 10 - Property, Plant and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Note 10 - Property, Plant and Equipment (Details) [Line Items]    
Depreciation $ 1,267us-gaap_Depreciation $ 1,283us-gaap_Depreciation
GREECE    
Note 10 - Property, Plant and Equipment (Details) [Line Items]    
Number of Completed Photovoltaic Plants 8sopw_NumberOfCompletePhotovoltaicPlants
/ us-gaap_StatementGeographicalAxis
= country_GR		  
CHINA    
Note 10 - Property, Plant and Equipment (Details) [Line Items]    
Number of Completed Photovoltaic Plants 1sopw_NumberOfCompletePhotovoltaicPlants
/ us-gaap_StatementGeographicalAxis
= country_CN