Principal Business Activity and Significant Accounting Policies - Collaboration Agreements (Details) $ in Millions	Dec. 31, 2019 USD ($)
Principal Business Activity and Significant Accounting Policies
Collaboration agreements, contingent payments to be made	$ 20.5

The amount of contingent payment to be made by the company on achievement of certain development, regulatory approval, and sales milestones under the collaboration agreement.

No definition available.

Name:	petq_CollaborationAgreementsContingentPaymentToBeMadeOnAchievementOfMilestones
Namespace Prefix:	petq_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant