The amount the entity has committed to make for aggregate future royalty guarantees under agreement.

No definition available.

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Namespace Prefix:	opht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of tranches in financing.

+ References

No definition available.

+ Details

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Namespace Prefix:	opht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from other borrowing not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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

- Details

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

- Definition

The amount the entity has committed to make for future royalty guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 928

-SubTopic 440

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=opht_NovoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Financing Agreement with Novo A/S (Details) (USD $)	3 Months Ended	1 Months Ended			23 Months Ended
Financing Agreement with Novo A/S (Details) (USD $)	Mar. 31, 2014	Nov. 30, 2014	Jan. 31, 2014	May 31, 2013 tranche	Mar. 31, 2015	Dec. 31, 2014
Agreement
Royalty rights purchase price					$ 125,000,000	$ 125,000,000
Proceeds from royalty purchase agreement	41,667,000us-gaap_ProceedsFromOtherDebt
Novo A/S \| Novo Agreement \| Fovista, Fovista-Related Products, and Other Products
Agreement
Number of tranches in financing				3
Aggregate royalty rights				125,000,000
Royalty rights purchase price				41,700,000
Proceeds from royalty purchase agreement		$ 41,700,000	$ 41,700,000	$ 41,700,000	$ 125,000,000