Note 2 - Revenue Recognition (Details Textual)	3 Months Ended
Jun. 30, 2020
Minimum [Member]
Credit Card Sales, Cash Settlement Period (Day)	2 days
Maximum [Member]
Credit Card Sales, Cash Settlement Period (Day)	3 days

Banking days the Company usually receives the cash settlement for sales paid by credit cards.

No definition available.

Name:	pets_CreditCardSalesCashSettlementPeriod
Namespace Prefix:	pets_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration