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Commitments and Contingencies - Narrative (Details) $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 30, 2023 | Jul. 31, 2023 USD ($) | Apr. 30, 2020 defendent | Dec. 31, 2024 USD ($) ft² | Dec. 31, 2023 USD ($) ft² | Mar. 31, 2023 shares | Jan. 31, 2023 USD ($) shares
Other Commitments [Line Items] |  |  |  |  |  |  |
Lease, cost |  |  |  | $ 2.6 | $ 3.5 |  |
McDermid v. Inovio Pharmaceuticals, Inc. and J. Joseph Kim |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Estimate of cash settlement |  |  |  |  |  |  | $ 30.0
Shares issued in settlement (in shares) | shares |  |  |  |  |  | 760,083 | 760,083
Estimate of shares settlement |  |  |  |  |  |  | $ 14.0
Behesti v. Kim, et al. |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Number of defendants | defendent |  |  | 8 |  |  |  |
Damages paid |  | $ 1.2 |  |  |  |  |
Minimum |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Operating lease, remaining lease term |  |  |  | 2 years 4 months 24 days |  |  |
Maximum |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Operating lease, remaining lease term |  |  |  | 5 years |  |  |
San Diego, California |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Lessee, operating lease, area of land under lease | ft² |  |  |  | 56,600 |  |  |
San Diego, California | Minimum |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Annual increase of base rent percentage | 2.00% |  |  |  |  |  |
San Diego, California | Maximum |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Annual increase of base rent percentage | 3.00% |  |  |  |  |  |
Plymouth Meeting, Pennsylvania |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Lessee, operating lease, area of land under lease | ft² |  |  |  | 57,400 | 11,400 |  |

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