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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Oct. 01, 2025	Sep. 30, 2025
Subsequent Events
Net proceeds		$ 94,025
2025 Underwriting Agreement | Common Stock
Subsequent Events
Stock offering price (in dollars per share)		$ 12.53
Subsequent Event | 2025 Underwriting Agreement | Common Stock
Subsequent Events
Stock offering price (in dollars per share)	$ 12.53
Net proceeds	$ 445,400

X

- Definition

Represents the offering price for shares in a stock offering.

+ References

No definition available.

+ Details

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Namespace Prefix:	ocul_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Period Type: