Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	May 23, 2017	Sep. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	PETMED EXPRESS INC
Entity Central Index Key	0001040130
Trading Symbol	pets
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--03-31
Entity Well-Known Seasoned Issuer	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		20,525,524
Entity Public Float			$ 396.4
Document Type	10-K
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY