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Warrants (Details) $ / shares in Units, shares in Millions, $ in Millions |  |  | 2 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 21, 2019 $ / shares | Nov. 05, 2019 $ / shares shares | Dec. 31, 2019 USD ($) measurementInput $ / shares shares | Dec. 31, 2019 USD ($) measurementInput $ / shares shares | Dec. 31, 2019 USD ($) measurementInput $ / shares shares | Nov. 04, 2019 $ / shares shares | Oct. 04, 2019 | Dec. 31, 2018 shares | Dec. 31, 2017 segment
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Pre-merger financing warrants, block provisions, exercise restriction percentage of common stock (in percentage) |  |  | 4.99% | 4.99% | 4.99% |  |  |  |
Pre-merger financing warrants, block provisions, exercise restriction percentage of common stock (in percentage) |  |  | 9.99% | 9.99% | 9.99% |  |  |  |
Percentage of amount on market value for failure to issue common stock on pre-merger financing warrants (in percentage) |  |  |  | 2.00% |  |  |  |  |
Percentage of volume-weighted average trading price of a share of common stock that triggered release of converted additional shares (in percentage) |  |  |  |  |  |  | 80.00% |  |
Number of former employees with warrants | segment |  |  |  |  |  |  |  |  | 2
Price Volatility |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Warrants fair value estimate volatility (in percentage) | measurementInput |  |  | 0.960 | 0.960 | 0.960 |  |  |  |
Series A Warrants |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Initial exercise price (in USD per share) |  |  | $ 7.13 | $ 7.13 | $ 7.13 |  |  |  |
Warrants outstanding, term |  |  | 60 months | 60 months | 60 months |  |  |  |
Proceeds From Warrant Exercises, Maximum Amount | $ |  |  | $ 10.0 |  |  |  |  |  |
Number of common shares in to which the warrants are exercisable (in shares) | shares |  |  | 8.8 | 8.8 | 8.8 |  |  |  |
Series B Warrants |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Initial exercise price (in USD per share) |  |  | $ 0.01 | $ 0.01 | $ 0.01 |  |  |  |
Warrants outstanding (in shares) | $ |  |  | $ 8.0 | $ 8.0 | $ 8.0 |  |  |  |
Percentage of volume-weighted average trading price of a share of common stock that triggered release of converted additional shares (in percentage) |  |  | 80.00% | 80.00% | 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 |  | $ 1.00 |  |  |  |
Common stock, issuable upon exercise of warrant (in shares) | shares |  |  | 12.6 | 12.6 | 12.6 |  |  |  |
Warrants, exercise price determination, number of trading days |  |  | 10 days |  |  |  |  |  |
Warrants expiration, trading day |  |  |  | 45 days | 45 days |  |  |  |
Series C Warrants |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Initial exercise price (in USD per share) |  |  | $ 0.00 | $ 0.00 | $ 0.00 | $ 7.13 |  |  |
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 common shares in to which the warrants are exercisable (in shares) | shares |  |  | 50.0 | 50.0 | 50.0 |  |  |  |
Warrants, exercise price determination, number of trading days |  |  | 5 days |  |  |  |  |  |
Warrants expiration, trading day |  |  |  |  | 45 days |  |  |  |
Series C Warrants | Maximum |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Number of common shares in to which the warrants are exercisable (in shares) | shares |  | 20.0 |  |  |  | 50.0 |  |  |
Former Ocugen warrants |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |
Initial exercise price (in USD per share) |  |  | $ 5.67 | $ 5.67 | $ 5.67 |  |  |  |
Warrants exercisable (in shares) | shares |  |  | 0.9 | 0.9 | 0.9 |  |  | 0.9 |

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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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- 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
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- 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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