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Fair Value Measurements - Valuation of Convertible Notes (Details) $ / shares in Units, $ in Millions	Apr. 16, 2025 $ / shares shares	Apr. 15, 2025 $ / shares shares	Dec. 31, 2025 $ / shares	Dec. 31, 2024 USD ($) Y $ / shares
Fair Value Measurements
Par value per share (in $ per share) \| $ / shares			$ 0.001	$ 0.001
Time to Qualified/non-Qualified financing (in years)
Fair Value Measurements
Convertible note, measurement input				0.25
Time to IPO (in years)
Fair Value Measurements
Convertible note, measurement input				0.25
Time to reverse merger (in years)
Fair Value Measurements
Convertible note, measurement input				0.33
Interest rate (risk-free)
Fair Value Measurements
Convertible note, measurement input				0.0437
Conversion discount rate
Fair Value Measurements
Convertible note, measurement input				0.20
Legacy Tvardi Convertible Notes
Fair Value Measurements
Issuance of common stock upon the conversion of Convertible Notes (in shares) \| shares	1,265,757	1,265,757
Par value per share (in $ per share) \| $ / shares	$ 0.001	$ 0.001
Convertible Notes
Fair Value Measurements
Aggregate principal amount \| $				$ 28.3
Convertible debt accrued interest rate				8.00%