XML 53 R41.htm IDEA: XBRL DOCUMENT
v3.21.2

Stockholders' Equity - Summary of information related to stock options (Details) | 6 Months Ended
--- | ---
Jun. 30, 2021 $ / shares shares
Options Outstanding, Outstanding Number of Options | 4,104,519
Options Exercisable, Weighted Average Remaining Life In Years | 6 years 10 months 24 days
Options Exercisable, Exercisable Number of Options | 2,185,978
Exercise Price 1.24 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 1.24
Options Outstanding, Outstanding Number of Options | 260,000
Options Exercisable, Weighted Average Remaining Life In Years | 3 years 8 months 12 days
Options Exercisable, Exercisable Number of Options | 260,000
Exercise Price 1.95 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 1.95
Options Outstanding, Outstanding Number of Options | 568,822
Options Exercisable, Weighted Average Remaining Life In Years | 6 years
Options Exercisable, Exercisable Number of Options | 568,822
Exercise Price 2.72 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 2.72
Options Outstanding, Outstanding Number of Options | 764,419
Options Exercisable, Weighted Average Remaining Life In Years | 0 years
Options Exercisable, Exercisable Number of Options | 254,807
Exercise Price 2.74 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 2.74
Options Outstanding, Outstanding Number of Options | 6,000
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 6 months
Options Exercisable, Exercisable Number of Options | 4,833
Exercise Price 2.89 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 2.89
Options Outstanding, Outstanding Number of Options | 263,500
Options Exercisable, Weighted Average Remaining Life In Years | 0 years
Options Exercisable, Exercisable Number of Options | 95,158
Exercise Price 3.11 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 3.11
Options Outstanding, Outstanding Number of Options | 659,849
Options Exercisable, Weighted Average Remaining Life In Years | 8 years 1 month 6 days
Options Exercisable, Exercisable Number of Options | 420,859
Exercise Price 3.43 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 3.43
Options Outstanding, Outstanding Number of Options | 58,920
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 3.48 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 3.48
Options Outstanding, Outstanding Number of Options | 45,000
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 3.71 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 3.71
Options Outstanding, Outstanding Number of Options | 43,000
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 4.00 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 4.00
Options Outstanding, Outstanding Number of Options | 2,000
Options Exercisable, Weighted Average Remaining Life In Years | 0 years
Options Exercisable, Exercisable Number of Options | 1,723
Exercise Price 4.53 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 4.53
Options Outstanding, Outstanding Number of Options | 127,000
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 4.68 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 4.68
Options Outstanding, Outstanding Number of Options | 25,000
Options Exercisable, Weighted Average Remaining Life In Years | 8 years 7 months 6 days
Options Exercisable, Exercisable Number of Options | 11,112
Exercise Price 5.10 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 5.10
Options Outstanding, Outstanding Number of Options | 6,000
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 2 months 12 days
Options Exercisable, Exercisable Number of Options | 5,500
Exercise Price 5.11 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 5.11
Options Outstanding, Outstanding Number of Options | 1,637
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 5.19 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 5.19
Options Outstanding, Outstanding Number of Options | 16,500
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 2 months 12 days
Options Exercisable, Exercisable Number of Options | 15,125
Exercise Price 5.25 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 5.25
Options Outstanding, Outstanding Number of Options | 26,668
Options Exercisable, Weighted Average Remaining Life In Years | 5 years 3 months 18 days
Options Exercisable, Exercisable Number of Options | 26,668
Exercise Price 5.77 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 5.77
Options Outstanding, Outstanding Number of Options | 50,000
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 6.01 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 6.01
Options Outstanding, Outstanding Number of Options | 652,899
Options Exercisable, Exercisable Number of Options | 0
Exercise Price 6.20 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 6.20
Options Outstanding, Outstanding Number of Options | 300,387
Options Exercisable, Weighted Average Remaining Life In Years | 7 years 1 month 6 days
Options Exercisable, Exercisable Number of Options | 296,119
Exercise Price 6.30 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 6.30
Options Outstanding, Outstanding Number of Options | 60,000
Options Exercisable, Weighted Average Remaining Life In Years | 7 years
Options Exercisable, Exercisable Number of Options | 58,333
Exercise Price 8.72 [Member] |
Options Outstanding, Outstanding Exercise Price | $ / shares | $ 8.72
Options Outstanding, Outstanding Number of Options | 166,918
Options Exercisable, Weighted Average Remaining Life In Years | 6 years 9 months 18 days
Options Exercisable, Exercisable Number of Options | 166,918

X
- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceNineMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceElevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceThirteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceFourteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceFifteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceSeventeenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceEighteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=eyen_ExercisePriceTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |