License Agreements (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Aug. 30, 2021	Jan. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Capitalized Contract Cost [Line Items]
Royalties on net product sales			$ 1,100,000
Royalties accrued on product sales			400,000
Due to licensor			5,757,000	$ 5,757,000
Total revenue			$ 15,216,000	1,120,000	$ 14,000,000
Right to terminate the agreement			120 days
Upfront payment		$ 14,000,000	$ 14,000,000
Amount of certain development, regulatory, and sales milestones payments eligible to receive under license agreement.			257,000,000
BMS License Agreement
Capitalized Contract Cost [Line Items]
Payment of license fees	$ 5,800,000
Related party transaction, balloon payment interest rate per annum	4.00%
BMS License Agreement | EOC Pharma (Hong Kong) Limited
Capitalized Contract Cost [Line Items]
Due to licensor				2,800,000
Payment received from license agreement		$ 14,000,000
Sublicense fees, percentage		20.00%
License expense recognized				2,800,000
Total revenue				1,000,000
BMS License Agreement
Capitalized Contract Cost [Line Items]
Payments related to milestone			$ 0	0
License fees, percentage of previously outstanding payment obligation	50.00%
Due to licensor	$ 5,800,000
BMS License Agreement | EOC Pharma (Hong Kong) Limited
Capitalized Contract Cost [Line Items]
Payment of license fees				200,000
License expense recognized				$ 200,000