Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Loss	$ (459,225)us-gaap_NetIncomeLoss	$ (1,017,230)us-gaap_NetIncomeLoss
Adjustments to Reconcile Net loss to Net Cash Used in Operating Activities:
Depreciation	8,700us-gaap_Depreciation	11,025us-gaap_Depreciation
Shares issued for services	47,832	74,417
Warrants issued as debt conversion issuance fees	0evsi_WarrantsIssuedAsDebtIssuanceFees	482,300evsi_WarrantsIssuedAsDebtIssuanceFees
Amortization of prepaid expenses paid in common stock	0	17,956
(Gain) loss on debt settlement	0	20,689
Compensation expense related to grant of stock options	7,065us-gaap_StockOptionPlanExpense	115,281us-gaap_StockOptionPlanExpense
Change in fair value of embedded conversion option liability	(207,411)us-gaap_UnrealizedGainLossOnDerivatives	(235,399)us-gaap_UnrealizedGainLossOnDerivatives
Amortization of debt issue costs	1,219us-gaap_AmortizationOfFinancingCosts	406us-gaap_AmortizationOfFinancingCosts
Amortization of debt discount	126,035	42,011
Changes in assets and liabilities: (Increase) decrease in:
Accounts receivable	(25,986)	166,334
Prepaid expenses and other current assets	(42,213)	15,338
Inventory	(427,716)us-gaap_IncreaseDecreaseInInventories	(80,106)us-gaap_IncreaseDecreaseInInventories
Costs and estimated earnings in excess of billings on uncompleted contracts	(19,052)	(39,529)
Deposits	856	(2,715)
Increase (decrease) in:
Accounts payable	(76,117)	144,834
Accrued expenses	129,873	(11,066)
Sales tax payable	18,559	0
Deferred revenue	319,175	0
Billings in excess of costs and estimated earnings on uncompleted contracts	(5,614)	(163,129)
NET CASH USED IN OPERATING ACTIVITIES	(604,020)	(458,583)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from sale of common stock	0	927,500
Proceeds from subscription receivable	25,000evsi_ProceedsFromSubscriptionReceivable	0evsi_ProceedsFromSubscriptionReceivable
Payments of offering costs related to sale of common stock	0us-gaap_PaymentsOfStockIssuanceCosts	(24,000)us-gaap_PaymentsOfStockIssuanceCosts
Repayments on convertible notes payable	(3,000)us-gaap_RepaymentsOfConvertibleDebt	(3,000)us-gaap_RepaymentsOfConvertibleDebt
Payments of debt issue costs	0us-gaap_PaymentsOfDebtIssuanceCosts	(6,500)us-gaap_PaymentsOfDebtIssuanceCosts
NET CASH PROVIDED BY FINANCING ACTIVITIES	22,000	894,000
NET (DECREASE) INCREASE IN CASH	(582,020)us-gaap_CashPeriodIncreaseDecrease	435,417us-gaap_CashPeriodIncreaseDecrease
CASH AT BEGINNING OF PERIOD	1,380,554us-gaap_Cash	392,098us-gaap_Cash
CASH AT END OF PERIOD	798,534us-gaap_Cash	827,515us-gaap_Cash
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	0us-gaap_InterestPaidNet	0us-gaap_InterestPaidNet
Cash paid for income tax	0us-gaap_IncomeTaxesPaid	0us-gaap_IncomeTaxesPaid
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Convertible debt converted to shares of common stock	0	550,000
Accrued interest converted to common stock	0	175,850
Warrants issued as debt extension fee	0evsi_WarrantsIssuedAsDebtExtensionFee	193,625evsi_WarrantsIssuedAsDebtExtensionFee
Embedded conversion option based effective interest	0	478,561
Transfer of inventory to property and equipment	41,229	0
Prepaid insurance financed by a third party	$ 19,981	$ 0

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