Fair Value Measurements - Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financial assets:
Total assets	$ 193,855	$ 106,609
Corporate Bonds [Member]
Financial assets:
Marketable securities	32,629	18,941
U.S. Treasury Securities [Member]
Financial assets:
Marketable securities	42,176	22,851
U.S. Government Agency Securities [Member]
Financial assets:
Marketable securities	7,542	11,423
Commercial Paper [Member]
Financial assets:
Cash equivalents		4,479
Marketable securities	43,591	13,000
Asset Backed Securities [Member]
Financial assets:
Marketable securities	12,120	7,310
Level 1 [Member]
Financial assets:
Total assets	55,797	28,605
Level 2 [Member]
Financial assets:
Total assets	138,058	78,004
Level 2 [Member] \| Corporate Bonds [Member]
Financial assets:
Marketable securities	32,629	18,941
Level 2 [Member] \| U.S. Treasury Securities [Member]
Financial assets:
Marketable securities	42,176	22,851
Level 2 [Member] \| U.S. Government Agency Securities [Member]
Financial assets:
Marketable securities	7,542	11,423
Level 2 [Member] \| Commercial Paper [Member]
Financial assets:
Cash equivalents		4,479
Marketable securities	43,591	13,000
Level 2 [Member] \| Asset Backed Securities [Member]
Financial assets:
Marketable securities	12,120	7,310
Money Market Funds [Member]
Financial assets:
Cash equivalents	55,797	28,605
Money Market Funds [Member] \| Level 1 [Member]
Financial assets:
Cash equivalents	$ 55,797	$ 28,605

Trevi Therapeutics, Inc. 10-Q