Balance Sheet Details - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]
Accounts payable	$ 2,505	$ 2,456
Accrued compensation	833	2,804
Accrued research and development	5,921	4,852
Accrued equity issuance costs	0	1,143
Other accrued expenses	1,072	813
Total	$ 10,331	$ 12,068