Class of Warrant or Right, Exercisable

No definition available.

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- Definition

The number of trading days considered for determination of exercise price of warrants.

+ References

No definition available.

+ Details

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- Definition

The percentage of the volume-weighted average trading price of a share of common stock as quoted on the Nasdaq Capital Market for the first three trading days immediately following the closing date of the Pre-Merger Financing as threshold to release converted additional shares.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

The price over which 80% of the arithmetic average of the two lowest dollar volume-weighted average prices of a share of common stock on the NASDAQ Capital Market during the applicable Reset Period immediately preceding the applicable Reset Date to date to release converted additional shares is determined.

+ References

No definition available.

+ Details

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

- Definition

If company fails to issue to a holder of the Pre-Merger Financing Warrants the number of shares of common stock to which such holder is entitled upon such holder's exercise of the such warrants, then company shall be obligated to pay the holder on each day while such failure is continuing an amount equal to percentage of the market value of the undelivered shares determined using any trading price of the common stock.

+ References

No definition available.

+ Details

Name:	ocgn_PercentageOfAmountOnMarketValueForFailureToIssueCommonStockOnPreMergerFinancingWarrants
Namespace Prefix:	ocgn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The exercise of the Pre-Merger Financing Warrants if, as a result of such exercise, the holder, together with its affiliates would beneficially own in excess percentage one of the outstanding common stock.

+ References

No definition available.

+ Details

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

- Definition

The exercise of the Pre-Merger Financing Warrants if, as a result of such exercise, the holder, together with its affiliates would beneficially own in excess percentage two of the outstanding common stock.

+ References

No definition available.

+ Details

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

- Definition

Proceeds From Qualified Equity Financing, Maximum Amount In Order To Be Excluded As Anti-Dilution Adjustment

+ References

No definition available.

+ Details

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Namespace Prefix:	ocgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

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

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Definition

Number of warrants or rights outstanding.

+ References

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

+ Details

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

- 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

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

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Period Type:	instant

- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=ocgn_SeriesCWarrantsMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=ocgn_FormerOcugenWarrantsMember
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Warrants (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended
	Nov. 21, 2019	Nov. 04, 2019	Sep. 27, 2019	Mar. 31, 2020	Dec. 31, 2019
Pre-Merger Financing Warrants
Percentage of excess common stock on pre-merger financing warrants exercised one (in percentage)			4.99%
Percentage of excess common stock on pre-merger financing warrants exercised two (in percentage)			9.99%
Percentage of amount on market value for failure to issue common stock on pre-merger financing warrants (in percentage)			2.00%
Series A Warrants
Pre-Merger Financing Warrants
Initial exercise price (in USD per share)				$ 7.13
Warrants and rights outstanding, term				60 months
Number of common shares in to which the warrants are exercisable (in shares)				8,800,000
Proceeds from warrant exercises, maximum amount				$ 10.0
Series B Warrants
Pre-Merger Financing Warrants
Initial exercise price (in USD per share)			$ 0.01
Number of common shares in to which the warrants are exercisable (in shares)			8,000,000.0	12,600,000
Warrants, exercise price determination, number of trading days			10 days
Percentage of volume-weighted average trading price of a share of common stock that triggered release of converted additional shares (in percentage)		80.00%
Price over which trading price of common stock as quoted on the Nasdaq Capital Market was considered for the release of converted additional shares (in USD per share)	$ 1.00	$ 1.00
Number of warrants outstanding (in shares)				1,000	1,000
Series C Warrants
Pre-Merger Financing Warrants
Initial exercise price (in USD per share)				$ 7.13
Number of common shares in to which the warrants are exercisable (in shares)		50,000,000.0
Price over which trading price of common stock as quoted on the Nasdaq Capital Market was considered for the release of converted additional shares (in USD per share)		$ 1.20
Number of warrants outstanding (in shares)				1,000	1,000
Series C Warrants \| Maximum
Pre-Merger Financing Warrants
Number of common shares in to which the warrants are exercisable (in shares)		50,000,000.0		20,000,000.0
Former Ocugen Warrants
Pre-Merger Financing Warrants
Initial exercise price (in USD per share)				$ 5.67
Class of warrant or right, exercisable (in shares)				900,000	900,000