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Organization and Summary of Significant Accounting Policies (Details Textual) (USD $)
12 Months Ended 1 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2014
Segment
Mar. 31, 2011
Feb. 04, 2013
Dec. 31, 2013
Mar. 16, 2011
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Number of business segment 2us-gaap_NumberOfOperatingSegments        
Expiration date of financing agreement Jan. 01, 2016        
Renewal period of agreement 12 months        
Additional renewal Period of agreement 12 months        
Cancelation period of agreement at least 60 days        
Account receivables $ 1,500,000slgd_AmountOfFactoringLineSecuredByAccountReceivable        
Percentage of advance rate of loan after March 1, 2011 85.00%slgd_PercentageOfAdvanceRateOfLoan        
Aggregate amount of inventory 500,000slgd_MaximumAggregateAmountIssuedUnderFinancingAgreement        
Percentage of administrative fees on inventory portion 1.00%slgd_PercentageOfAdministrativeFeesOnOutstandingLoanOnInventoryPortion        
Percentage of administrative fees on receivable portion, Less Than or equal to $1000000 0.85%slgd_PercentageOfAdministrativeFeesOnOutstandingLoanOnReceivablePortionLessThanSpecifiedAmount        
Percentage of administrative fees on receivable portion, More Than $1000000 0.75%slgd_PercentageOfAdministrativeFeesOnOutstandingLoanOnReceivablePortionMoreThanSpecifiedAmount        
Computation of administrative fees on receivable portion, Specified Amount for different rates 1,000,000slgd_ComputationOfAdministrativeFeesOnOutstandingLoanSpecifiedAmount        
Credit line available for future factoring of accounts receivables and borrowings secured by inventory 1,500,000slgd_CreditLineAvailableForFutureFactoringOfAccountsReceivableAndBorrowingsSecuredByInventory     1,500,000slgd_CreditLineAvailableForFutureFactoringOfAccountsReceivableAndBorrowingsSecuredByInventory  
Credit line loan balance     0us-gaap_LineOfCredit    
Percentage of retained account receivable as interest. 15.00%slgd_PercentageOfRetainedAccountReceivableAsInterest        
Minimum          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Period to maturity of receivables sold   102 days      
Maximum          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Period to maturity of receivables sold   105 days      
Summit          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Sale of account receivables 0slgd_SaleOfAccountReceivable
/ dei_LegalEntityAxis
= slgd_SummitMember
    824,200slgd_SaleOfAccountReceivable
/ dei_LegalEntityAxis
= slgd_SummitMember
 
Proceeds from sale of account receivables       700,600us-gaap_ProceedsFromSaleAndCollectionOfReceivables
/ dei_LegalEntityAxis
= slgd_SummitMember
 
Retained interest on accounts receivable 15.00%slgd_AccountsReceivableInterestRate
/ dei_LegalEntityAxis
= slgd_SummitMember
       
Repayment of outstanding balance on credit line     909,778us-gaap_RepaymentsOfLinesOfCredit
/ dei_LegalEntityAxis
= slgd_SummitMember
   
Wells Fargo Bank          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Variable rate 0.28%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dei_LegalEntityAxis
= slgd_WellsFargoBankMember
       
Sale of account receivables 4,516,100slgd_SaleOfAccountReceivable
/ dei_LegalEntityAxis
= slgd_WellsFargoBankMember
    4,098,000slgd_SaleOfAccountReceivable
/ dei_LegalEntityAxis
= slgd_WellsFargoBankMember
 
Proceeds from sale of account receivables $ 4,497,700us-gaap_ProceedsFromSaleAndCollectionOfReceivables
/ dei_LegalEntityAxis
= slgd_WellsFargoBankMember
    $ 4,080,600us-gaap_ProceedsFromSaleAndCollectionOfReceivables
/ dei_LegalEntityAxis
= slgd_WellsFargoBankMember
 
Period of LIBOR rate used 104 days        
Period of notice for termination of agreement 30 days        
Prime Rate          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Variable rate 3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
       
Prime Rate | Accounts Receivables          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Interest rate of agreement amount 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
       
Prime Rate | Inventories          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Interest rate of agreement amount 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_InventoriesMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
       
LIBOR Rate | Wells Fargo Bank          
Schedule Of Organization And Presentation Of Financial Statements [Line Items]          
Interest rate of agreement amount         1.15%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= slgd_WellsFargoBankMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember