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Organization and Operations - Liquidity (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021
Liquidity |  |  |
Accumulated deficit | $ 482,383 | $ 455,809 |
Cash, cash equivalents and short-term investments | $ 102,500 |  |
Cowen |  |  |
Liquidity |  |  |
Percentage of commission paid to underwriter based on proceeds from common stock | 3.00% |  |
Jefferies | ATM |  |  |
Liquidity |  |  |
Maximum aggregate value of common shares which can be issued under the agreement |  |  | $ 25,000

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