7. ACCRUED EXPENSES (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accrued vacation	$ 122,537us-gaap_AccruedVacationCurrent	$ 100,304us-gaap_AccruedVacationCurrent
Accrued officers' salary	68,749us-gaap_AccruedSalariesCurrent	68,749us-gaap_AccruedSalariesCurrent
Accrued interest	173,437us-gaap_InterestPayableCurrent	201,688us-gaap_InterestPayableCurrent
Accrued estimated losses on contracts	1,590evsi_AccruedEstimatedLossesOnContracts	96,096evsi_AccruedEstimatedLossesOnContracts
Accrued Rent	0us-gaap_AccruedRentCurrent	101,839us-gaap_AccruedRentCurrent
Other accrued expense	1,913us-gaap_OtherAccruedLiabilitiesCurrent	34,624us-gaap_OtherAccruedLiabilitiesCurrent
Total accrued expenses	$ 368,226us-gaap_AccruedLiabilitiesCurrent	$ 603,300us-gaap_AccruedLiabilitiesCurrent

Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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