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Stockholders' Equity - Additional Information (Parenthetical) (Detail)
 0 Months Ended 3 Months Ended
Jan. 30, 2015
Mar. 31, 2015
Common Stock [Member] | CECEP Solar Energy Hong Kong Co., Limited [Member]    
Schedule of Stockholders Equity Details [Line Items]    
Stock Issued During Period, Shares, Acquisitions 5,722,977us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_BusinessAcquisitionAxis
= sopw_CecepSolarEnergyHongKongCompanyLimitedMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		  
Restricted Stock [Member]    
Schedule of Stockholders Equity Details [Line Items]    
Stock exercised during period, shares   19,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember