XML 46 R34.htm IDEA: XBRL DOCUMENT
v3.8.0.1

11. CONVERTIBLE NOTE PAYABLE (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Debt Disclosure [Abstract] |
Convertible notes payable summary |
|  |  |  |  |  |  |  | Convertible Notes Payable, net of |
|  | Amount |  |  | Discount |  |  | discount |
Pegasus Note |  | $ | 100,000 |  |  | $ | – |  |  | $ | 100,000 |
“Lender” Note |  |  | 1,500,000 |  |  |  | 175,668 |  |  |  | 1,324,332 |
|  | $ | 1,600,000 |  |  | $ | 175,668 |  |  | $ | 1,424,332 |

X
- Definition Convertible notes payable summary [Table Text Block] + References No definition available. + Details
Name: | evsi_ConvertibleNotesPayableTableTextBlock
Namespace Prefix: | evsi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration