Fair value of warrants issued.

No definition available.

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- Definition

Line of credit facility exit fees percentage.

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility Increase Additional Borrowings On Condition Satisfaction

+ References

No definition available.

+ Details

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

- Definition

Line of credit facility principal amount repayment percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	eypt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding), subject to certain conditions.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of interest only installments.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of tranches to cost allocated under term loan.

+ References

No definition available.

+ Details

Name:	eypt_NumberOfTranchesToCostAllocatedUnderTermLoan
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Data Type:	xbrli:integerItemType
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- Definition

Shares issued and outstanding.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Definition

Term loan facility interest rate floor.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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- Definition

Warrants exercise period.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Warrants issued as percentage of loan advanced amount.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of warrants issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

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-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt premium.

+ References

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section S45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68176171&loc=SL68176184-208336

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the first payment under the line of credit must be paid, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

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

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payments of both interest and principal.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

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- Details

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Term Loan Agreement - Additional Information (Detail)		9 Months Ended
Term Loan Agreement - Additional Information (Detail)	Mar. 28, 2018 USD ($) Payments Tranches $ / shares shares	Mar. 31, 2018 $ / shares	Jun. 30, 2017 $ / shares	Mar. 31, 2017 $ / shares	Jun. 30, 2016 $ / shares
Shares Issued And Outstanding [Line Items]
Exercise price of issued warrants \| $ / shares		$ 1.10	$ 2.50	$ 2.50	$ 2.50
Senior Secured Term Loan [Member]
Shares Issued And Outstanding [Line Items]
Upfront loan origination fee percentage	1.50%
Proceeds from issuance of term loan, net of allocation to the debt warrant	$ 14,600,000
Upfront fee, exit Fee and legal costs related to loan	$ 2,100,000
Cost allocated tranches, number \| Tranches	2
Senior Secured Term Loan [Member] \| Initial Advance Warrant Shares [Member]
Shares Issued And Outstanding [Line Items]
Total debt discount at issuance date	$ 1,800,000
Senior Secured Term Loan [Member] \| Additional Advance Warrant Shares [Member]
Shares Issued And Outstanding [Line Items]
Total debt discount at issuance date	$ 299,000
Senior Secured Term Loan [Member] \| Warrants [Member]
Shares Issued And Outstanding [Line Items]
Warrants exercise period	7 years	7 years
Senior Secured Term Loan [Member] \| Warrants [Member] \| Initial Advance Warrant Shares [Member]
Shares Issued And Outstanding [Line Items]
Warrants issued in connection with loan \| shares	409,091
Exercise price of issued warrants \| $ / shares	$ 1.10
Fair value of warrants issued	$ 284,000
Senior Secured Term Loan [Member] \| Warrants [Member] \| Additional Advance Warrant Shares [Member]
Shares Issued And Outstanding [Line Items]
Warrants issuable as a percentage of additional loan advance	3.00%
Fair value of warrants issued	$ 69,000
Senior Secured Term Loan [Member] \| SWK Funding LLC [Member]
Shares Issued And Outstanding [Line Items]
Agreement date	Mar. 28, 2018
Senior secured term loan	$ 20,000,000
Senior secured term loan, initial advance	15,000,000
Senior secured term loan, additional advance available subject to certain conditions	5,000,000
Potential future increase in the credit facility, subject to certain condition	$ 10,000,000
Maturity date	Mar. 27, 2023
Number of interest only repayments \| Payments	8
Loan repayment basis	Quarterly
Loan repayment commencement date	May 15, 2018
Maximum amount of quarterly repayment of loan principal	$ 1,250,000
Upfront loan origination fee percentage	1.50%
Exit fee percentage	6.00%
Prepayment premium due	$ 0
Senior Secured Term Loan [Member] \| SWK Funding LLC [Member] \| Prepayment After First Anniversary And On Or Prior To Second Anniversary [Member]
Shares Issued And Outstanding [Line Items]
Aggregate amount of the principal prepaid, percentage	6.00%
Senior Secured Term Loan [Member] \| SWK Funding LLC [Member] \| Prepayment After Second Anniversary And On Or Prior To Third Anniversary [Member]
Shares Issued And Outstanding [Line Items]
Aggregate amount of the principal prepaid, percentage	1.00%
Senior Secured Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| SWK Funding LLC [Member]
Shares Issued And Outstanding [Line Items]
Interest rate	Three-month LIBOR rate (subject to a 1.5% floor) plus 10.50%.
LIBOR floor rate	1.50%
Interest rate (subject to floor rate)	10.50%