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v3.24.1.u1

Inventory - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Inventory [Line Items] |  |
Inventory | $ 9,916 | $ 10,205
Fanapt® |  |
Inventory [Line Items] |  |
Inventory | 2,700 | 3,000
HETLIOZ® |  |
Inventory [Line Items] |  |
Inventory | $ 7,300 | $ 7,200

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Inventory + References No definition available. + Details
Name: | vnda_Inventory
Namespace Prefix: | vnda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | srt_ProductOrServiceAxis=vnda_FanaptMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=vnda_HetliozMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |