Fair Value of Financial Instruments - Summary of Fair Value of Financial Instrument (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Jul. 01, 2020
Assets:
Money market funds	$ 57,018	$ 94,631
Total short-term investments	177,272	218,221
Total	234,290	312,852
Liabilities:
Preferred stock purchase right liability			$ 41,600
Commercial Paper
Assets:
Total short-term investments	21,272	63,445
Corporate Debt Securities
Assets:
Total short-term investments	111,466	48,614
U.S. Government Securities
Assets:
Total short-term investments	44,534	106,162
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Money market funds	57,018	94,631
Total	57,018	94,631
Significant Other Observable Inputs (Level 2)
Assets:
Total short-term investments	177,272	218,221
Total	177,272	218,221
Significant Other Observable Inputs (Level 2) | Commercial Paper
Assets:
Total short-term investments	21,272	63,445
Significant Other Observable Inputs (Level 2) | Corporate Debt Securities
Assets:
Total short-term investments	111,466	48,614
Significant Other Observable Inputs (Level 2) | U.S. Government Securities
Assets:
Total short-term investments	$ 44,534	$ 106,162