Fair Value Measurements (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	$ 82,149	$ 115,436
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	1,088	698
Money market funds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	34,524	71,175
Commercial paper
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	33,355	31,935
U.S. government-sponsored agency bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	10,755
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	2,511	7,022
Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	1,004	5,304
Derivative liability for exit fees
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	1,088	698
Level 1
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	34,524	71,175
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	0	0
Level 1 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	34,524	71,175
Level 1 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 1 | U.S. government-sponsored agency bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0
Level 1 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 1 | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 1 | Derivative liability for exit fees
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	0	0
Level 2
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	47,625	44,261
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	0	0
Level 2 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 2 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	33,355	31,935
Level 2 | U.S. government-sponsored agency bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	10,755
Level 2 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	2,511	7,022
Level 2 | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	1,004	5,304
Level 2 | Derivative liability for exit fees
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	0	0
Level 3
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	1,088	698
Level 3 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 3 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 3 | U.S. government-sponsored agency bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0
Level 3 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 3 | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Assets, fair value	0	0
Level 3 | Derivative liability for exit fees
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, fair value	$ 1,088	$ 698