Organization - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 68,255	$ 76,054
Accumulated deficit	$ 852,640	$ 842,852
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares outstanding	215,950,561	216,127,443
Common Stock [Member]
Common stock, shares outstanding	215,950,561
Common stock reserved for future issuance	33,891,996