v3.22.4
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Feb. 02, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-34186    
Entity Registrant Name VANDA PHARMACEUTICALS INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 03-0491827    
Entity Address, Address Line One 2200 Pennsylvania Avenue NW    
Entity Address, Address Line Two Suite 300 E    
Entity Address, City or Town Washington    
Entity Address, State or Province DC    
Entity Address, Postal Zip Code 20037    
City Area Code 202    
Local Phone Number 734-3400    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol VNDA    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 601.3
Entity Common Stock, Shares Outstanding   56,785,264  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Specified portions of the registrant’s proxy statement with respect to the registrant’s 2023 Annual Meeting of Stockholders, which is to be filed pursuant to Regulation 14A within 120 days after the end of the registrant’s fiscal year ended December 31, 2022, are incorporated by reference into Part III of this Form 10-K.
    
Amendment Flag false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001347178