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v3.21.2

Stockholders' Equity - Warrants Activity (Details) | 6 Months Ended
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Jun. 30, 2021 USD ($) $ / shares shares
Stockholders' Equity |
Outstanding at beginning balance | shares | 2,011,313
Granted | shares | 91,884
Exercised | shares | (877,014)
Outstanding at ending balance | shares | 1,226,183
Exercisable Number of warrants | shares | 1,226,183
Outstanding at beginning balance | $ / shares | $ 2.43
Granted | $ / shares | 4.76
Exercised | $ / shares | 2.40
Outstanding at ending balance | $ / shares | 2.69
Exercisable | $ / shares | $ 2.69
Weighted Average Remaining Life, Outstanding | 4 years 2 months 12 days
Weighted Average Remaining Life, Exercisable | 4 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding | $ | $ 2,788,188
Aggregate Intrinsic Value, Exercisable | $ | $ 2,788,188

X
- Definition Number of warrants or rights exercisable. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightExercisable
Namespace Prefix: | eyen_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate intrinsic value of warrants or rights exercisable. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightExercisableAggregateIntrinsicValue
Namespace Prefix: | eyen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average exercise price of warrants or rights exercisable. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightExercisableWeightedAverageExercisePrice
Namespace Prefix: | eyen_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining life of warrants or rights exercisable, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightExercisableWeightedAverageRemainingLife
Namespace Prefix: | eyen_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights exercised during the period. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightExercised
Namespace Prefix: | eyen_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average exercise price of warrants or rights exercised during the period. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightExercisedWeightedAverageExercisePrice
Namespace Prefix: | eyen_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights granted during the period. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightGranted
Namespace Prefix: | eyen_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average exercise price of warrants or rights granted during the period. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightGrantedWeightedAverageExercisePrice
Namespace Prefix: | eyen_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate intrinsic value of warrants or rights outstanding. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightOutstandingAggregateIntrinsicValue
Namespace Prefix: | eyen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average exercise price of warrants or rights outstanding. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice
Namespace Prefix: | eyen_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining life of warrants or rights outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | eyen_ClassOfWarrantOrRightOutstandingWeightedAverageRemainingLife
Namespace Prefix: | eyen_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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