Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net (loss) income	$ (3,957)	$ 4,279
Less: net income attributable to non-controlling interests	1,929	$ (4,279)
Net (loss) income attributable to PetIQ, Inc.	$ (2,028)
Denominator:
Weighted-average shares of Class A common stock outstanding - basic (in shares)	14,574,883
Weighted-average shares of Class A common stock outstanding - diluted (in shares)	14,574,883
Earnings per share of Class A common stock - basic ( in dollars per shares)	$ (0.14)
Earnings per share of Class A common stock - diluted ( in dollars per shares)	$ (0.14)
Stock options
Denominator:
Anti dilutive shares excluded from computation of diluted earnings per share	1,792,648