Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Mar. 31, 2026	May 22, 2026	Sep. 30, 2025
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--03-31
Document Period End Date	Mar. 31, 2026
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
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction Flag	true
Document Financial Statement Restatement Recovery Analysis [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 46.0
Entity Common Stock, Shares Outstanding		21,365,782
Documents Incorporated by Reference	Information to be set forth in our proxy statement relating to our 2026 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, 2026.
Entity Central Index Key	0001040130
Amendment Flag	false
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	FY
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, PETS $.001 Par value per share
Trading Symbol	PETS
Security Exchange Name	NASDAQ
Preferred Stock Purchase Rights
Document Information [Line Items]
Title of 12(b) Security	Preferred Stock Purchase Rights
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ