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Cover - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2024
Jun. 13, 2024
Sep. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --03-31    
Document Period End Date Mar. 31, 2024    
Document Transition Report false    
Entity File Number 000-28827    
Entity Registrant Name PETMED EXPRESS, INC.    
Entity Incorporation, State or Country Code FL    
Entity Tax Identification Number 65-0680967    
Entity Address, Address Line One 420 South Congress Avenue    
Entity Address, City or Town Delray Beach    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33445    
City Area Code 561    
Local Phone Number 526-4444    
Title of 12(b) Security Common Stock, PETS $.001 Par value per share    
Trading Symbol PETS    
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 Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 209.2
Entity Common Stock, Shares Outstanding   20,606,692  
Documents Incorporated by Reference
Information to be set forth in our proxy statement relating to our 2024 Annual Meeting of Shareholders is incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of our fiscal year ended March 31, 2024.
    
Entity Central Index Key 0001040130    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY