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7. COMMITMENTS AND CONTINGENCIES (Details Narrative)	6 Months Ended
	Jun. 30, 2020
Lease 1 [Member]
Lease expiration date	August 2020
Monthly lease payments	$48,672 per month increasing to $50,519 per month for the final year of the lease.
Lease 2 [Member]
Lease expiration date	August 2025
Monthly lease payments	$52,000 per month to $58,526 per month for the final year of the lease.

X

- Definition

Lease expiration date

+ References

No definition available.

+ Details

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X

- Definition

Monthly lease payments

+ References

No definition available.

+ Details

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Namespace Prefix:	evsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=evsi_Lease1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=evsi_Lease2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: