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Other Liabilities - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Sinsin Renewable Investment Limited [Member]  
Schedule of Other Liabilities (Details) [Line Items]  
Business Combination, Contingent Consideration, Liability, Current $ 22,700us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
/ us-gaap_BusinessAcquisitionAxis
= sopw_SinsinRenewableInvestmentLimitedMember
Xinte [Member]  
Schedule of Other Liabilities (Details) [Line Items]  
Business Combination, Contingent Consideration, Liability, Current 3,710us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
/ us-gaap_BusinessAcquisitionAxis
= sopw_XinteMember
CECEP Solar Energy Hong Kong Co., Limited [Member]  
Schedule of Other Liabilities (Details) [Line Items]  
Business Combination, Contingent Consideration, Liability, Current $ 2,283us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
/ us-gaap_BusinessAcquisitionAxis
= sopw_CecepSolarEnergyHongKongCompanyLimitedMember