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v3.20.2

Nature of the Business (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jan. 27, 2020 | Apr. 15, 2019 | Jun. 22, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Class of Stock |  |  |  |  |  |  |  |
Net loss |  |  |  | $ (37,315) | $ (27,248) | $ (99,233) | $ (82,905) |
Accumulated deficit |  |  |  | 336,383 |  | 336,383 |  | $ 237,150
Cash |  |  |  | $ 177,695 | $ 229,366 | $ 177,695 | $ 229,366 | $ 210,643
Ordinary Shares | IPO |  |  |  |  |  |  |  |
Class of Stock |  |  |  |  |  |  |  |
Number of shares issued in transaction (in shares) |  |  | 10,147,059 |  |  |  |  |
Per share price of issuance (usd per share) |  |  | $ 17.00 |  |  |  |  |
Proceeds of issuance of ordinary shares, net of issuance costs |  |  | $ 156,500 |  |  |  |  |
Ordinary Shares | Options |  |  |  |  |  |  |  |
Class of Stock |  |  |  |  |  |  |  |
Number of shares issued in transaction (in shares) |  | 630,000 | 1,323,529 |  |  |  |  |
Ordinary Shares | Underwriters public offering |  |  |  |  |  |  |  |
Class of Stock |  |  |  |  |  |  |  |
Number of shares issued in transaction (in shares) | 7,250,000 | 4,830,000 |  |  |  |  |  |
Per share price of issuance (usd per share) | $ 11.00 | $ 24.00 |  |  |  |  |  |
Proceeds of issuance of ordinary shares, net of issuance costs | $ 74,000 | $ 108,800 |  |  |  |  |  |

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