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Organization and Summary of Significant Accounting Policies (Details Textual 2) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Period over which compensation costs related to non-vested stock options recognize 48 months 48 months
Expiry of options 5 years 5 years
Price of option with maximum maturity 120.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent 120.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
Weighted average fair market value of the options granted $ 0.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 0.30us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Stock-based compensation $ 66,700us-gaap_ShareBasedCompensation $ 55,300us-gaap_ShareBasedCompensation
Unrecognized compensation costs related to non-vested stock options 242,500us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions  
Tax benefit from recording non-cash expense relates to options granted to employees 0us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions  
Shipping and handling costs 1,517,500us-gaap_ShippingHandlingAndTransportationCosts 1,461,700us-gaap_ShippingHandlingAndTransportationCosts
Minimum    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Period over which compensation costs related to non-vested stock options recognize 48 months  
Maximum    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Period over which compensation costs related to non-vested stock options recognize 60 months  
General and Administrative Expense    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Stock-based compensation $ 66,700us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
$ 55,300us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
Executive Officer    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted 250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember
85,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember
Average Option Price Per Share Granted $ 0.86us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember
$ 0.41us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember
Period over which compensation costs related to non-vested stock options recognize 60 months  
Expiry of options 10 years  
Vice President    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted 35,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= us-gaap_VicePresidentMember
 
Average Option Price Per Share Granted $ 0.78us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= us-gaap_VicePresidentMember
 
Administrative Employee    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted 2,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_AdministrativeEmployeeMember
 
Average Option Price Per Share Granted $ 0.78us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_AdministrativeEmployeeMember
 
Two Non-Employee Directors    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted 60,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_TwoNonEmployeeDirectorsMember
 
Average Option Price Per Share Granted $ 0.79us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_TwoNonEmployeeDirectorsMember
 
One Non-Employee Director    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted 30,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_OneNonEmployeeDirectorMember
 
Average Option Price Per Share Granted $ 0.79us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_OneNonEmployeeDirectorMember
 
One Board Member    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted   30,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_OneBoardMemberMember
Average Option Price Per Share Granted   $ 0.55us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_OneBoardMemberMember
Regional Sales Manager One    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted   15,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_RegionalSalesManagerOneMember
Average Option Price Per Share Granted   $ 0.55us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_RegionalSalesManagerOneMember
Regional Sales Manager Two    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted   15,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_RegionalSalesManagerTwoMember
Average Option Price Per Share Granted   $ 0.49us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_RegionalSalesManagerTwoMember
Executive Officer One    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted   50,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_ExecutiveOfficerOneMember
Average Option Price Per Share Granted   $ 0.78us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= slgd_ExecutiveOfficerOneMember
Three Non-Employee Directors    
Organization and Summary of Significant Accounting Policies (Additional Textual) [Abstract]    
Number of Shares Granted   90,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= slgd_ThreeNonEmployeeDirectorsMember