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INCOME TAXES (Schedule of Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Effective income rax rate reconciliation:    
Statutory United States federal rate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes net of federal benefit (0.70%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 4.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Noncontrolling interest in pass-through entity (3.40%)us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary   
Permanent difference (2.30%)dss_EffectiveIncomeTaxRateReconciliationPermanentDifference (4.50%)dss_EffectiveIncomeTaxRateReconciliationPermanentDifference
Other 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.80%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Change in valuation reserves (26.60%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 98.10%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effective tax rate 2.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations 131.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations