Marketable Securities and Fair Value of Financial Assets and Liabilities - Schedule of Financial Assets and Liabilities at Fair Value on Recurring Basis (Detail) - Recurring Basis [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets:
Total assets	$ 212,974	$ 228,219
Liabilities:
CVR liability		1,700
Total liabilities		1,700
Level 1 [Member]
Assets:
Total assets	153,408	108,829
Level 2 [Member]
Assets:
Total assets	59,566	119,390
Level 3 [Member]
Liabilities:
CVR liability		1,700
Total liabilities		1,700
Money Market Funds [Member]
Assets:
Cash equivalents	153,408	108,829
Money Market Funds [Member] | Level 1 [Member]
Assets:
Cash equivalents	153,408	108,829
U.S. Treasury Bills and Notes [Member]
Assets:
Marketable Securities	59,566	119,390
U.S. Treasury Bills and Notes [Member] | Level 2 [Member]
Assets:
Marketable Securities	$ 59,566	$ 119,390