XML 76 R64.htm IDEA: XBRL DOCUMENT v3.8.0.1

15. STOCK OPTIONS AND WARRANTS (Details-Warrant Activity) - Warrants [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number of Warrants
Number of Warrants Outstanding, Beginning	28,196,822	29,219,441
Number of Warrants Granted	4,416,667	291,667
Number of Warrants Exercised		0
Number of Warrants Forfeited		0
Number of Warrants Expired	(26,831,589)	(1,314,286)
Number of Warrants Outstanding, Ending	5,781,900	28,196,822
Number of Warrants Exercisable, Ending	5,781,900
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding, Beginning	$ 0.17	$ 0.18
Weighted Average Exercise Price Granted	0.15	0.15
Weighted Average Exercise Price Exercised
Weighted Average Exercise Price Forfeited
Weighted Average Exercise Price Expired	0.16	0.33
Weighted Average Exercise Price Outstanding, Ending	0.17	$ 0.17
Weighted Average Exercise Price Exercisable	0.17
Weighted average grant date fair value	$ 0.08

X

- Definition

Number of warrants [Abstract}

+ References

No definition available.

+ Details

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

X

- Definition

Number of Warrants Exercisable, Ending

+ References

No definition available.

+ Details

Name:	evsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisableNumber
Namespace Prefix:	evsi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Warrants - Weighted Average Exercise Price Exercisable

+ References

No definition available.

+ Details

Name:	evsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix:	evsi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Warrants - Weighted Average Exercise Price Exercised

+ References

No definition available.

+ Details

Name:	evsi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix:	evsi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Warrants - Weighted Average Exercise Price Expired

+ References

No definition available.

+ Details

Name:	evsi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	evsi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Warrants Weighted Average Exercise Price Forfeited

+ References

No definition available.

+ Details

Name:	evsi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice
Namespace Prefix:	evsi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average exercise price of warrants [Abstract]

+ References

No definition available.

+ Details

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

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of non-option equity instruments exercised by participants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of shares under non-option equity instrument agreements for which rights to exercise lapsed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: