Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 07, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2020
Entity File Number	001-38163
Entity Registrant Name	PetIQ, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	35-2554312
Entity Address, Address Line One	923 S. Bridgeway Pl.
Entity Address, City or Town	Eagle
Entity Address, State or Province	ID
Entity Address, Postal Zip Code	83616
City Area Code	208
Local Phone Number	939-8900
Title of 12(b) Security	Class A Common Stock, $0.001 par value
Trading Symbol	PETQ
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Central Index Key	0001668673
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false
Class A common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		24,918,092
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,653,763