Fair Value Measurements - Summary of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Assets:
Marketable securities:	$ 22,405,000	$ 0
Liabilities:
Warrant liabilities	45,455,000	28,708,000
Corporate bonds
Assets:
Marketable securities:	2,031,000
Commercial paper
Assets:
Marketable securities:	20,374,000
Recurring
Assets:
Total assets	80,563,000	80,576,000
Liabilities:
Warrant liabilities	45,455,000	28,708,000
Total liabilities	45,455,000	28,708,000
Recurring | (Level 1)
Assets:
Total assets	58,158,000	80,576,000
Liabilities:
Warrant liabilities	0	0
Total liabilities	0	0
Recurring | (Level 2)
Assets:
Total assets	22,405,000	0
Liabilities:
Warrant liabilities	0	0
Total liabilities	0	0
Recurring | (Level 3)
Assets:
Total assets	0	0
Liabilities:
Warrant liabilities	45,455,000	28,708,000
Total liabilities	45,455,000	28,708,000
Recurring | Corporate bonds
Assets:
Marketable securities:	2,031,000
Recurring | Corporate bonds | (Level 1)
Assets:
Marketable securities:	0
Recurring | Corporate bonds | (Level 2)
Assets:
Marketable securities:	2,031,000
Recurring | Corporate bonds | (Level 3)
Assets:
Marketable securities:	0
Recurring | Commercial paper
Assets:
Marketable securities:	20,374,000
Recurring | Commercial paper | (Level 1)
Assets:
Marketable securities:	0
Recurring | Commercial paper | (Level 2)
Assets:
Marketable securities:	20,374,000
Recurring | Commercial paper | (Level 3)
Assets:
Marketable securities:	0
Recurring | Money market funds
Assets:
Money market funds	58,158,000	80,576,000
Recurring | Money market funds | (Level 1)
Assets:
Money market funds	58,158,000	80,576,000
Recurring | Money market funds | (Level 2)
Assets:
Money market funds	0	0
Recurring | Money market funds | (Level 3)
Assets:
Money market funds	$ 0	$ 0