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Statements of Changes in Stockholders’ Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2017 USD ($)
Proceeds Of Stock Issued During Period Gross	$ 6,409,651
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 41,958

X

- Definition

It represents issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	eyen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration