Portion of stock units subject to performance condition description one

No definition available.

Name:	eypt_PortionOfStockUnitsSubjectToPerformanceConditionDescriptionOne
Namespace Prefix:	eypt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Portion of stock units subject to performance condition description two.

+ References

No definition available.

+ Details

Name:	eypt_PortionOfStockUnitsSubjectToPerformanceConditionDescriptionTwo
Namespace Prefix:	eypt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Resignation date of employee.

+ References

No definition available.

+ Details

Name:	eypt_ResignationDateOfEmployee
Namespace Prefix:	eypt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Share based compensation arrangement by share based payment award equity instruments other than options vested weighted average remaining contractual term.

+ References

No definition available.

+ Details

Name:	eypt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageRemainingContractualTerm
Namespace Prefix:	eypt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, cumulative measurement.

+ References

No definition available.

+ Details

Name:	eypt_ShareBasedCompensationArrangementBySharebasedPaymentAwardCumulativeMeasurement
Namespace Prefix:	eypt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ 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)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

+ 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=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Description of terms of award under share-based payment arrangement.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of vesting of award under share-based payment arrangement.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=eypt_PerformanceStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefFinancialOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=eypt_LongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=eypt_PerformanceConditionOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=eypt_PerformanceConditionTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=eypt_InducementAwardGrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Share-Based Payment Awards - Performance-Based Stock Units - Additional Information (Detail) - Performance Stock Units [Member] - shares					9 Months Ended
	Oct. 12, 2019	Mar. 19, 2019	Oct. 12, 2018	Mar. 19, 2018	Sep. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Weighted average remaining vesting term					10 days
Former Chief Financial Officer [Member]
Class of Stock [Line Items]
Cumulative measurement period					3 years
Resignation date of employee					Jul. 08, 2019
Long Term Incentive Plan [Member]
Class of Stock [Line Items]
Number of Stock Units Outstanding					0	225,000
Subsequent Event [Member]
Class of Stock [Line Items]
Number of Stock Units Outstanding	56,666
Performance Condition One [Member]
Class of Stock [Line Items]
Portion of stock units subject to an FDA acceptance of the Company's NDA submission of YUTIQ for review on or before March 31, 2018					One third
Stock units vesting, percentage		50.00%		50.00%
Number of Performance-Based Stock Units, vested				48,332
Number of performance-based stock units subject to service-based vesting of one year from performance condition achievement date		48,334
Performance Condition Two [Member]
Class of Stock [Line Items]
Portion of stock units subject to an FDA approval of YUTIQ on or before March 31, 2019					Two-thirds
Stock units vesting, percentage			50.00%
Number of Performance-Based Stock Units, vested			96,668
Performance Condition Two [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Stock units vesting, percentage	50.00%
Number of performance-based stock units subject to service-based vesting of one year from performance condition achievement date	96,666
Inducement Award Grants [Member] \| Former Chief Financial Officer [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award					The PSUs are subject to proportional vesting based on cumulative measurement over a 3-year period, with two-thirds of the award based upon the achievement of defined amounts of the Company’s product revenues through June 30, 2021 and one-third of the award based upon the net present value of each applicable business development transaction, as defined, through August 1, 2021 measured as of the date that each such transaction is consummated by the Company.