XML 38 R27.htm IDEA: XBRL DOCUMENT v3.10.0.1

13. REVENUES (Tables)

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Schedule of revenues

		For the nine months ended September 30,
		2018				2017
Product Sales		$	4,642,428			$	1,094,898
Maintenance Fees			5,682				5,220
Professional Services			10,575				3,825
Total Revenues		$	4,658,685			$	1,103,943

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of revenue by reporting categories or types of financial instruments, including derivatives but excluding dividends and interests, from trading for own account by broker dealers.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42567-110969

+ Details

Name:	us-gaap_ScheduleOfPrincipalTransactionsRevenueTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration