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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Loss $ (3,146,302)us-gaap_NetIncomeLoss $ (2,793,910)us-gaap_NetIncomeLoss
Adjustments to Reconcile Net loss to Net Cash Used in Operating Activities:    
Depreciation 41,392us-gaap_Depreciation 44,359us-gaap_Depreciation
Bad debt expense 0us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease 11,700us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Warrants issued as debt conversion inducement fee 482,300evsi_WarrantsIssuedAsConversionInducement 0evsi_WarrantsIssuedAsConversionInducement
Common stock issued for services 261,280us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims 74,264us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
Amortization of prepaid expenses paid in common stock 17,956us-gaap_OtherNoncashExpense 48,675us-gaap_OtherNoncashExpense
Gain (loss) on debt settlement, net 14,688evsi_GainOnDebtSettlementNet (112,667)evsi_GainOnDebtSettlementNet
Gain on settlement of debt for common stock 0evsi_GainOnSettlementOfDebtForCommonStock (1,500)evsi_GainOnSettlementOfDebtForCommonStock
Compensation expense related to grant of stock options 457,152us-gaap_ShareBasedCompensation 435,028us-gaap_ShareBasedCompensation
Change in fair value of embedded conversion option liability (404,215)us-gaap_UnrealizedGainLossOnDerivatives (174,808)us-gaap_UnrealizedGainLossOnDerivatives
Amortization of debt discount 420,116us-gaap_AmortizationOfFinancingCostsAndDiscounts 456,073us-gaap_AmortizationOfFinancingCostsAndDiscounts
Amortization of debt issue costs 4,062us-gaap_AmortizationOfFinancingCosts 5,000us-gaap_AmortizationOfFinancingCosts
Changes in assets and liabilities: (Increase) decrease in:    
Accounts receivable 76,242us-gaap_IncreaseDecreaseInAccountsReceivable 138,357us-gaap_IncreaseDecreaseInAccountsReceivable
Prepaid expenses and other current assets (114,479)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (5,793)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Costs and estimated earnings in excess of billings on uncompleted contracts (92,666)us-gaap_IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract 0us-gaap_IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract
Inventory (328,431)us-gaap_IncreaseDecreaseInInventories 36,853us-gaap_IncreaseDecreaseInInventories
Deposits (154,940)us-gaap_IncreaseDecreaseInDepositOtherAssets 0us-gaap_IncreaseDecreaseInDepositOtherAssets
Increase (decrease) in:    
Accounts Payable 108,901us-gaap_IncreaseDecreaseInAccountsPayable (58,436)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued Expenses (79,913)us-gaap_IncreaseDecreaseInAccruedLiabilities 250,883us-gaap_IncreaseDecreaseInAccruedLiabilities
Sales Tax Payable 59,959us-gaap_IncreaseDecreaseInAccruedTaxesPayable (2,036)us-gaap_IncreaseDecreaseInAccruedTaxesPayable
Deferred Revenue 717,291us-gaap_IncreaseDecreaseInDeferredRevenue (80,000)us-gaap_IncreaseDecreaseInDeferredRevenue
Billings in excess of costs and estimated earnings on uncompleted contracts (157,515)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings 136,291us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings
NET CASH USED IN OPERATING ACTIVITIES (1,817,122)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (1,591,667)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchase of Equipment (76,092)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (41,948)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
NET CASH USED IN INVESTING ACTIVITIES (76,092)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (41,948)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES:    
Repayments on convertible notes payable (12,000)us-gaap_RepaymentsOfConvertibleDebt (12,067)us-gaap_RepaymentsOfConvertibleDebt
Proceeds from Sale of Common Stock 3,003,010us-gaap_ProceedsFromIssuanceOfCommonStock 1,935,200us-gaap_ProceedsFromIssuanceOfCommonStock
Payments of offering costs related to sale of common stock (102,840)us-gaap_PaymentsOfStockIssuanceCosts (154,816)us-gaap_PaymentsOfStockIssuanceCosts
Payments of Debt Issue Costs (6,500)us-gaap_PaymentsOfDebtIssuanceCosts 0us-gaap_PaymentsOfDebtIssuanceCosts
NET CASH PROVIDED BY FINANCING ACTIVITIES 2,881,670us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 1,768,317us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
NET INCREASE IN CASH 988,456us-gaap_CashPeriodIncreaseDecrease 134,702us-gaap_CashPeriodIncreaseDecrease
CASH AT BEGINNING OF YEAR 392,098us-gaap_Cash  
CASH AT END OF YEAR 1,380,554us-gaap_Cash 392,098us-gaap_Cash
Supplemental Disclosure of Cash Flow Information:    
Cash paid for interest 0us-gaap_InterestPaidNet 0us-gaap_InterestPaidNet
Cash paid for income tax 1,600us-gaap_IncomeTaxesPaid 1,600us-gaap_IncomeTaxesPaid
Supplemental Disclosure of Non-Cash Investing and Financing Activities:    
Convertible debt converted to shares of common stock 550,000us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities 0us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
Accrued interest converted to common stock 175,850evsi_StockIssuedInSettlementOfInterest 0evsi_StockIssuedInSettlementOfInterest
Warrants issued as debt extension fee 193,625evsi_WarrantsIssuedAsDebtExtensionFee 0evsi_WarrantsIssuedAsDebtExtensionFee
Embedded conversion option liability recorded as debt discount 478,561evsi_EmbeddedConversionOptionLiabilityRecordedAsDebtDiscount 0evsi_EmbeddedConversionOptionLiabilityRecordedAsDebtDiscount
Prepaid common stock issued for services 0evsi_PrepaidCommonStockIssuedForServices 85,740evsi_PrepaidCommonStockIssuedForServices
Common stock issued in conversion of note payable and accrued interest 24,000evsi_CommonStockIssuedInConversionOfNotePayableAndAccruedInterest 28,500evsi_CommonStockIssuedInConversionOfNotePayableAndAccruedInterest
Subscription receivable $ 25,000evsi_SubscriptionReceivable $ 0evsi_SubscriptionReceivable