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Major Suppliers (Details)
 3 Months Ended 9 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2014
Nov. 30, 2013
Summary of percentage of purchase from major vendors (Textual)        
Percentage of purchases from major vendors 63.00%us-gaap_ConcentrationRiskPercentage1 76.00%us-gaap_ConcentrationRiskPercentage1 28.00%us-gaap_ConcentrationRiskPercentage1 46.00%us-gaap_ConcentrationRiskPercentage1
Supplier Concentration Risk [Member] | Egide, USA [Member]        
Summary of percentage of purchase from major vendors (Textual)        
Percentage of purchases from major vendors     17.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionAxis
= sodi_EgideUsaMember		 37.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionAxis
= sodi_EgideUsaMember
Supplier Concentration Risk [Member] | Eastern states components ,Inc. [Member]        
Summary of percentage of purchase from major vendors (Textual)        
Percentage of purchases from major vendors     11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionAxis
= sodi_EasternStatesComponentsMember		  
Supplier Concentration Risk [Member] | Air Products, Inc. [Member]        
Summary of percentage of purchase from major vendors (Textual)        
Percentage of purchases from major vendors       9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionAxis
= sodi_AirProductsInc.Member