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Face (par) amount of debt instrument at time of issuance.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Indicates line item in statement of income or comprehensive income that includes gain (loss) from liability measured at fair value using unobservable input (level 3).

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended		12 Months Ended
	Apr. 16, 2025	Apr. 15, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Fair Value Measurements
Fair value of convertible notes	$ 23,100	$ 35,900
Change in fair value of the convertible notes					$ 7,800
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]					Other Nonoperating Income (Expense)
Automatic conversion Up On Qualified Or Non Qualified
Fair Value Measurements
Weighted percentage		2.50%				20.00%
Automatic conversion upon IPO
Fair Value Measurements
Weighted percentage		0.00%				10.00%
Automatic conversion upon reverse merger
Fair Value Measurements
Weighted percentage		95.00%				60.00%
Conversion upon default dissolution or liquidation
Fair Value Measurements
Weighted percentage		2.50%				10.00%
Convertible Notes
Fair Value Measurements
Aggregate principal amount						$ 28,300
Fair value of convertible notes						30,100
Change in fair value of the convertible notes	$ 12,800		$ 12,752	$ (4,942)		$ (1,800)
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)					Other Nonoperating Income (Expense)
Fair value of convertible notes				$ 35,759		$ 30,259
Debt issuance costs						$ 100
Legacy Tvardi Convertible Notes
Fair Value Measurements
Issuance of common stock upon the conversion of Convertible Notes (in shares)	1,265,757	1,265,757