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v3.21.2

Organization and Operations - Liquidity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Common Stock |  |  |  |
Accumulated deficit |  | $ (438,447) |  | $ (260,897)
Cash and cash equivalents | $ 51,885 | $ 139,520 | $ 51,885 | $ 24,930
Cowen |  |  |  |
Common Stock |  |  |  |
Percentage of commission paid to underwriter based on proceeds from common stock |  | 3.00% |  |
Jefferies |  |  |  |
Common Stock |  |  |  |
Remaining available under sales agreement |  | $ 25,000 |  |
Jefferies | ATM |  |  |  |
Common Stock |  |  |  |
Maximum aggregate value of common shares which can be issued under the agreement |  | 25,000 |  |
Common Stock |  |  |  |
Common Stock |  |  |  |
Issuance of common stock for at-the-market offerings (in shares) | 926,429 |  | 1,100,001 |
Common Stock | ATM |  |  |  |
Common Stock |  |  |  |
Issuance of common stock for at-the-market offerings (in shares) |  |  | 1,100,001 |
Share price (in dollars per share) | $ 6.87 |  | $ 6.87 |
Proceeds from public offering, net of issuance costs |  | $ 7,300 |  |

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