Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.23.2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
Institution
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Institution
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]          
Accumulated deficit $ (444,791)   $ (444,791)   $ (444,768)
Cash and cash equivalents 4,952 $ 26,936 4,952 $ 26,936 32,190
Restricted cash included in other assets $ 2,315 $ 2,668 $ 2,315 $ 2,668 $ 2,500
Restricted Cash and Cash Equivalents, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other assets Other assets Other assets Other assets Other assets
Number Of Financial Institutions | Institution 2   2    
Revenue | Concentration of Credit Risk and Other Risks and Uncertainties | Takeda Pharmaceuticals Inc          
Organization And Summary Of Significant Accounting Policies [Line Items]          
Percentage of total revenues 0.00% 0.00% 0.00% 20.00%  
Revenue | Concentration of Credit Risk and Other Risks and Uncertainties | Bristol Myers Squibb          
Organization And Summary Of Significant Accounting Policies [Line Items]          
Percentage of total revenues 97.00% 100.00% 93.00% 80.00%