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9. COMMITMENTS AND CONTINGENCIES (Details Narrative)	6 Months Ended
	Jun. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Current monthly lease payment	$ 46,800
Lease expiration date	Aug. 31, 2020

X

- Definition

Current monthly lease payment

+ References

No definition available.

+ Details

Name:	evsi_CurrentMonthlyLeasePayment
Namespace Prefix:	evsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration