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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 |  |  |  |  |

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