Commitments and Contingencies - Purchase Commitments - Additional Information (Details)	6 Months Ended
Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Agreements for clinical and marketing services, termination notice period	90 days

Agreements For Clinical And Marketing Services, Termination Notice Period

No definition available.

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Namespace Prefix:	vnda_
Data Type:	xbrli:durationItemType
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Period Type:	duration