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Related Party Transactions (Details) ₩ in Billions |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 27, 2020 USD ($) shares | Aug. 27, 2020 KRW (₩) shares | Nov. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Feb. 20, 2020 shares
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  | $ 454,486,400 | $ 9,089,010 | $ 29,227,776 |
Awarded option amount |  |  |  |  | 6,000,000.0 |  |  |
GeneOne (affiliated entity) |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 40,100,000 | ₩ 47.4 |  |  |  |  |  |
Accounts receivable |  |  |  |  |  | 128,000 |  |
Due to related parties |  |  |  |  |  | 511,000 |  |
GeneOne (affiliated entity) |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Number of shares owned (shares) | shares | 1,644,155 | 1,644,155 |  |  |  |  |  |
Proceeds from issuance of common stock | $ 40,100,000 | ₩ 47.4 |  |  |  |  |  |
Revenue from related parties |  |  |  |  | 125,000 | 127,000 | 342,000 |
Operating expenses related to affiliated entity |  |  |  |  | $ 4,700,000 | 2,500,000 | $ 7,000,000.0 |
PLS (affiliated entity) |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Number of shares owned (shares) | shares |  |  |  |  | 597,808 |  |  |
Accounts receivable |  |  |  |  | $ 67,000 | 589,000 |  |
Revenue from related parties |  |  |  |  | $ 1,400,000 | 111,000 |  |
Percentage of ownership |  |  |  |  | 19.70% |  |  |
PLS (affiliated entity) | Available-for-sale Securities |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Investment owned, additional shares acquired (in shares) | shares |  |  |  |  |  |  |  | 202,050
The Wistar Institute |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | $ 425,000 | 616,000 |  |
Due to related parties |  |  |  |  | 643,000 | 219,000 |  |
Operating expenses related to affiliated entity |  |  |  |  | 2,300,000 | 1,500,000 |  |
Expenses to reimburse |  |  |  | $ 3,100,000 |  |  |  |
Term |  |  |  | 5 years |  |  |  |
Proceeds from sub-grant |  |  | $ 6,100,000 |  |  |  |  |
Awarded amount |  |  |  |  | 10,700,000 |  |  |
Grant proceeds received |  |  |  |  | 1,900,000 | $ 2,200,000 |  |
Deferred grant funding from affiliate |  |  |  |  | $ 96,000 |  |  |

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