XML 83 R64.htm IDEA: XBRL DOCUMENT
v3.19.1

15. STOCK OPTIONS AND WARRANTS (Details-Warrant Activity) - Warrants [Member] - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Number of Warrants |  |
Number of Warrants Outstanding, Beginning | 5,781,900 | 28,196,822
Number of Warrants Granted | 0 | 4,416,667
Number of Warrants Exercised | 0 | 0
Number of Warrants Forfeited | 0 | 0
Number of Warrants Expired | (645,067) | (26,831,589)
Number of Warrants Outstanding, Ending | 6,717,950 | 5,781,900
Number of Warrants Exercisable, Ending | 6,717,950 |
Weighted Average Exercise Price |  |
Weighted Average Exercise Price Outstanding, Beginning | $ 0.17 | $ 0.17
Weighted Average Exercise Price Granted | 0.21 | 0.15
Weighted Average Exercise Price Exercised |  |
Weighted Average Exercise Price Forfeited |  |
Weighted Average Exercise Price Expired | 0.25 | 0.16
Weighted Average Exercise Price Outstanding, Ending | 0.17 | $ 0.17
Weighted Average Exercise Price Exercisable | 0.17 |
Weighted average grant date fair value | $ 0.13 |

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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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: |