Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net (loss) income	$ (1,960)	$ 5,918	$ (4,593)	$ 8,244
Net (loss) income attributable to non-controlling interest	(69)	2,103	(599)	2,818
Net (loss) income attributable to PetIQ, Inc.	$ (1,891)	$ 3,815	$ (3,994)	$ 5,426
Denominator:
Basic weighted average shares (in shares)	24,425	22,365	24,077	22,087
Weighted-average shares of Class A common stock outstanding - diluted (in shares)	24,425	22,597	24,077	22,284
Basic net income (loss) per common share	$ (0.08)	$ 0.17	$ (0.17)	$ 0.25
Diluted net (loss) income per common share	$ (0.08)	$ 0.17	$ (0.17)	$ 0.24
Stock options
Denominator:
Dilutive effects of stocks		215		188
Anti dilutive shares excluded from computation of diluted earnings per share		1,180		1,550
RSU
Denominator:
Dilutive effects of stocks		17		9