Organization - Additional Information (Details) - USD ($) $ in Thousands		6 Months Ended
	Aug. 14, 2023	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Cash, cash equivalents and restricted cash		$ 18,317	$ 52,996	$ 60,011	$ 76,054
Accumulated deficit		$ 899,448	$ 880,627
Common stock, shares authorized		520,000,000	420,000,000
Common stock, shares outstanding		240,627,055	240,410,761
Research and Development [Member]
Reversal of accrued expenses		$ 700
Common Stock [Member]
Common stock, shares outstanding		240,627,055
Common stock reserved for future issuance		36,531,228
Subsequent Event [Member]
Intended percentage of resduction in workforce	60.00%
Strategic advisor name	Cantor