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Note 7 - Accounts and Notes Receivable (Details) (USD $)
9 Months Ended 12 Months Ended 3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Jun. 30, 2013
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Increase (Decrease) in Accounts Receivable $ (2,395,000)us-gaap_IncreaseDecreaseInAccountsReceivable $ (9,401,000)us-gaap_IncreaseDecreaseInAccountsReceivable    
Accrued Liabilities, Current 813,000us-gaap_AccruedLiabilitiesCurrent   741,000us-gaap_AccruedLiabilitiesCurrent  
Accounts Receivable, Net, Current 7,020,000us-gaap_AccountsReceivableNetCurrent   6,260,000us-gaap_AccountsReceivableNetCurrent  
Accounts Receivable, Net, Noncurrent 9,194,000us-gaap_AccountsReceivableNetNoncurrent   12,349,000us-gaap_AccountsReceivableNetNoncurrent  
Notes, Loans and Financing Receivable, Net, Noncurrent 13,416,000us-gaap_NotesAndLoansReceivableNetNoncurrent   13,668,000us-gaap_NotesAndLoansReceivableNetNoncurrent  
Sale of Greece Project [Member]        
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Increase (Decrease) in Accounts Receivable     8,800,000us-gaap_IncreaseDecreaseInAccountsReceivable
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
 
Accounts Receivable Extended Collection Period     6 years  
Accrued Liabilities, Current     5,100,000us-gaap_AccruedLiabilitiesCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
 
Accounts Receivable, Net, Current 1,800,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
  2,200,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
 
Accounts Receivable, Net, Noncurrent 4,900,000us-gaap_AccountsReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
  6,600,000us-gaap_AccountsReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
 
Sale of Greece Project [Member] | Completed Contract Method [Member]        
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Revenues     13,900,000us-gaap_Revenues
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SaleOfGreeceProjectMember
/ us-gaap_FairValueByMeasurementBasisAxis
= sopw_CompletedContractMethodMember
 
Second Unrealated Customer [Member] | Expected Collection Period [Member]        
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Accounts Receivable, Collection Term       1 year
Second Unrealated Customer [Member]        
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Accounts Receivable, Net, Current 1,600,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SecondUnrelatedCustomerMember
  2,000,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SecondUnrelatedCustomerMember
 
Accounts Receivable, Net, Noncurrent 4,300,000us-gaap_AccountsReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SecondUnrelatedCustomerMember
  5,800,000us-gaap_AccountsReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SecondUnrelatedCustomerMember
 
Second Unrealated Customer [Member] | Expected Collection Period [Member]        
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Exchange of Account Receivable from Current to Noncurrent       5,900,000sopw_ExchangeOfAccountReceivableFromCurrentToNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_SecondUnrelatedCustomerMember
/ us-gaap_FairValueByMeasurementBasisAxis
= sopw_ExpectedCollectionPeriodMember
Exchange and Release Agreement [Member] | KDC Solar RTC, LLC [Member]        
Note 7 - Accounts and Notes Receivable (Details) [Line Items]        
Accounts Receivable, Collection Term     15 years  
Notes, Loans and Financing Receivable, Net, Noncurrent $ 13,400,000us-gaap_NotesAndLoansReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_ExchangeAndReleaseAgreementMember
/ us-gaap_CounterpartyNameAxis
= sopw_KDCSolarRTCLLCMember
  $ 13,700,000us-gaap_NotesAndLoansReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= sopw_ExchangeAndReleaseAgreementMember
/ us-gaap_CounterpartyNameAxis
= sopw_KDCSolarRTCLLCMember