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Stockholders' Equity - Additional Information (Detail) - USD ($) |  |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
May 29, 2025 | May 22, 2025 | Nov. 27, 2024 | Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2025 | Dec. 31, 2024
Stockholders Equity Disclosure [Line Items] |  |  |  |  |  |  |
Aggregate amounts of restricted capital and statutory reserves |  |  |  | $ 66,400,000 |  | $ 66,400,000 | $ 64,300,000
Statutory reserve fund |  |  |  |  |  | 10.00% |
Cumulative amount of statutory reserve fund |  |  |  |  |  | 50.00% |
Appropriations to statutory reserve |  |  |  |  |  | $ 0 | $ 0
Gyre [Member] | Gyre Pharmaceuticals |  |  |  |  |  |  |
Stockholders Equity Disclosure [Line Items] |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  |  | 9,184,910 |  | 9,184,910 |
Proceeds from the issuance of common stock |  |  |  | $ 1,280,000 |  | $ 1,280,000 |
Minority interest ownership indirectly holds |  |  |  | 69.70% | 65.20% | 69.70% |
Percentage of diluted minority interest ownership |  |  |  | 30.30% | 34.80% |  |
2024 ATM Program |  |  |  |  |  |  |
Stockholders Equity Disclosure [Line Items] |  |  |  |  |  |  |
Proceeeds from issuance of aggregate gross sales |  |  | $ 50,000,000 |  |  |  |
Percentage of commission for shares sold |  |  | 3.00% |  |  |  |
Legal expenses incurred |  |  | $ 100,000 |  |  |  |
Issuance of common stock (in shares) |  |  |  | 0 |  | 54,734 |
Proceeds from the issuance of common stock |  |  |  |  |  | $ 509,000 |
Commissions and offering costs |  |  |  |  |  | 8,600 |
May 2025 Underwritten Public Offering |  |  |  |  |  |  |
Stockholders Equity Disclosure [Line Items] |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  |  |  |  | $ 23,000,000 |
Common stock issue and sold |  | 2,222,222 |  |  |  | 2,555,555 |
Public offering price |  | $ 9 |  |  |  |  |
Underwriters option period |  | 30 days |  |  |  |  |
Offering closing date |  | May 27, 2025 |  |  |  |  |
Underwriters' discounts and commissions |  |  |  |  |  | $ 1,400,000 |
Offering costs |  |  |  |  |  | 300,000 |
Net proceeds from issuance of common stock |  |  |  |  |  | $ 21,300,000 |
Greenshoe Option |  |  |  |  |  |  |
Stockholders Equity Disclosure [Line Items] |  |  |  |  |  |  |
Common stock issue and sold |  | 333,333 |  |  |  |  |
Issuance of additional shares settled | 333,333 |  |  |  |  |  |

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