Fair Value Measurements of Financial Assets and Liabilities - Schedule of Financial Assets and Liabilities at Fair Value on Recurring Basis (Detail) - Recurring Basis [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets:
Total Assets	$ 228,219
Liabilities:
CVR Liability	1,700	$ 3,060
Total Liabilities	1,700	3,060
Level 1 [Member]
Assets:
Total Assets	108,829
Level 2 [Member]
Assets:
Total Assets	119,390
Level 3 [Member]
Liabilities:
CVR Liability	1,700	3,060
Total Liabilities	1,700	$ 3,060
Money Market Funds [Member]
Assets:
Cash equivalents	108,829
Money Market Funds [Member] | Level 1 [Member]
Assets:
Cash equivalents	108,829
U.S. Treasury Bills and Notes [Member]
Assets:
Marketable Securities	119,390
U.S. Treasury Bills and Notes [Member] | Level 2 [Member]
Assets:
Marketable Securities	$ 119,390