Organization - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 60,011	$ 76,054
Accumulated deficit	$ 862,572	$ 842,852
Common stock, shares authorized	420,000,000	350,000,000
Common stock, shares outstanding	216,174,542	216,127,443
Common Stock [Member]
Common stock, shares outstanding	216,174,542
Common stock reserved for future issuance	33,008,978