Name:	ocup_ContingentValueRightEntitledPerEachShareOfCommonStockHeld
Namespace Prefix:	ocup_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

Name:	ocup_ContingentValueRightsAgreementAbstract
Namespace Prefix:	ocup_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Period for parent IP deal.

No definition available.

Name:	ocup_ContingentValueRightsIPTerm
Namespace Prefix:	ocup_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Payment period for contingent value rights.

No definition available.

Name:	ocup_ContingentValueRightsPaymentPeriod
Namespace Prefix:	ocup_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Percentage of payments received by Rexahn or its affiliates.

No definition available.

Name:	ocup_ContingentValueRightsPercentage
Namespace Prefix:	ocup_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

Name:	ocup_MergerInformationAbstract
Namespace Prefix:	ocup_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of initial board of directors of the combined company required to complete transaction.

No definition available.

Name:	ocup_NumberOfDirectorsRequiredToCompleteTransition
Namespace Prefix:	ocup_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of milestones had been accrued during the period.

No definition available.

Name:	ocup_NumberOfMilestonesAccrued
Namespace Prefix:	ocup_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of potential milestones had been accrued during the period.

No definition available.

Name:	ocup_NumberOfPotentialMilestones
Namespace Prefix:	ocup_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Cash consideration paid by a third party to Rexahn or its affiliates during the applicable CVR payment period.

No definition available.

Name:	ocup_PercentageOfCashConsiderationPayment
Namespace Prefix:	ocup_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

No definition available.

Name:	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Face amount or stated value per share of common stock.

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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

Number of new stock issued during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_TypeOfArrangementAxis=ocup_SecuritiesPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_BusinessAcquisitionAxis=ocup_FormerStockholdersAndOptionholdersOfPrivateOcuphireMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_BusinessAcquisitionAxis=ocup_RexahnStockholdersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionAxis=ocup_BioSenseGlobalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: