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Commitments and Contingencies - Additional Information (Detail)
$ / shares in Units, ¥ in Millions
 1 Months Ended 3 Months Ended
Aug. 26, 2024
USD ($)
$ / shares
Oct. 30, 2023
USD ($)
May 31, 2024
CNY (¥)
Feb. 28, 2023
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2025
CNY (¥)
Mar. 31, 2024
USD ($)
Apr. 30, 2025
Dec. 31, 2024
USD ($)
Jun. 28, 2024
USD ($)
Commitments And Contingencies Disclosure [Line Items]                    
Purchase of property and equipment         $ 122,000   $ 231,000      
Maximum                    
Commitments And Contingencies Disclosure [Line Items]                    
Investment obligation amount                   $ 4,200,000
Percentage of equity interest                   18.93%
Subsequent Event                    
Commitments And Contingencies Disclosure [Line Items]                    
Percentage of equity interest               18.35%    
Property and Equipment                    
Commitments And Contingencies Disclosure [Line Items]                    
Purchase of property and equipment         4,800,000          
Research and Development                    
Commitments And Contingencies Disclosure [Line Items]                    
Committed to allocate         $ 20,000,000          
Contingent Value Rights Agreement                    
Commitments And Contingencies Disclosure [Line Items]                    
Percentage of excess cash on dispositions net         100.00% 100.00%        
Excess amount retained from net proceeds related to disposition of assets         $ 1,000,000          
Percentage of excess preapproved costs         100.00% 100.00%        
Distribution to CVR holders from asset sale proceeds       $ 200,000            
Long-term CVR derivative liability       $ 4,500,000            
CVR derivative liability         $ 0       $ 5,000,000  
Contributions closing payable amount   $ 1,100,000                
Remaining outstanding balance         $ 0          
Distributions to holders $ 12,600,000                  
Distributions to holders per CVR | $ / shares $ 0.4                  
Contingent Value Rights Agreement | Vertex Asset Purchase Agreement                    
Commitments And Contingencies Disclosure [Line Items]                    
Percentage of amount received on agreement         100.00% 100.00%        
Contingent Value Rights Agreement | GCBP Asset Purchase Agreement                    
Commitments And Contingencies Disclosure [Line Items]                    
Amount to be received under agreement         $ 5,000,000          
F351 | GNI                    
Commitments And Contingencies Disclosure [Line Items]                    
Committed to allocate         12,700,000          
F351 | Gyre Pharmaceuticals                    
Commitments And Contingencies Disclosure [Line Items]                    
Payments for exchange of intellectual property rights         0          
F351 | Gyre Pharmaceuticals | Submission of the New Drug Application                    
Commitments And Contingencies Disclosure [Line Items]                    
Obligation to pay in exchange for the intellectual property rights         4,600,000          
F351 | Gyre Pharmaceuticals | NDA Passes the NMPA's Review and Inspection                    
Commitments And Contingencies Disclosure [Line Items]                    
Obligation to pay in exchange for the intellectual property rights         1,200,000          
F351 | Gyre Pharmaceuticals | NMPA's Approval of the NDA                    
Commitments And Contingencies Disclosure [Line Items]                    
Obligation to pay in exchange for the intellectual property rights         $ 6,900,000          
Nintedanib IP Rights                    
Commitments And Contingencies Disclosure [Line Items]                    
Contingent royalty minimum payment | ¥     ¥ 35.0              
Contingent royalty payment description         The contingent payment in the first year will be 5% of sales for that year minus RMB 10 million, or approximately $1.4 million, based on the March 31, 2025 spot exchange rate. The contingent payment in the second year will be 4% of sales for that year minus RMB 10 million, or approximately $1.4 million, based on the March 31, 2025 spot exchange rate. The contingent payment in the third year through the eighth year will be 3%, 2%, 2%, 1%, 1%, and 1% of sales in each year, respectively. The contingent payment in the first year will be 5% of sales for that year minus RMB 10 million, or approximately $1.4 million, based on the March 31, 2025 spot exchange rate. The contingent payment in the second year will be 4% of sales for that year minus RMB 10 million, or approximately $1.4 million, based on the March 31, 2025 spot exchange rate. The contingent payment in the third year through the eighth year will be 3%, 2%, 2%, 1%, 1%, and 1% of sales in each year, respectively.        
Contingent royalty payment sales for first year | ¥           ¥ 10.0        
Contingent royalty payment sales for second year | ¥           ¥ 10.0        
Contingent royalty payment sales spot exchange rate for first year         $ 1,400,000          
Contingent royalty payment sales spot exchange rate for second year         $ 1,400,000          
Contingent royalty payment percentage of sale for first year         5.00%          
Contingent royalty payment percentage of sale for second year         4.00%          
Contingent royalty payment percentage of sale for third year         3.00%          
Contingent royalty payment percentage of sale for fourth year         2.00%          
Contingent royalty payment percentage of sale for fifth year         2.00%          
Contingent royalty payment percentage of sale for sixth year         1.00%          
Contingent royalty payment percentage of sale for seventh year         1.00%          
Contingent royalty payment percentage of sale for eighth year         1.00%          
Minimum payments based on spot exchange rate         $ 4,900,000