Business Combination - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Oct. 17, 2018	Jan. 17, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Combination
Number of shares Issued						4,200,000
Intangible assets, net of accumulated amortization			$ 98,166		$ 98,166		$ 88,030
Remainder of 2019			1,807		1,807
Acquisition costs			$ 1,960	$ 113	$ 5,425	$ 3,479
Class B common stock
Business Combination
Number of shares Issued						4,200,000
Common stock, par value			$ 0.001		$ 0.001		$ 0.001
VIP
Business Combination
Total purchase price, net of cash acquired		$ 198,300
Goodwill not deductible for tax purposes					$ 49,800
HBH
Business Combination
Total purchase price, net of cash acquired					14,655
Goodwill not deductible for tax purposes					5,000
HBH | Class B common stock
Business Combination
Number of shares Issued	400,000
Common stock, par value	$ 0.001
HBH | Holdco
Business Combination
Number of shares Issued	400,000
Common stock, par value	$ 0.001
Perrigo Animal Health Acquisition
Business Combination
Intangible assets, net of accumulated amortization			$ 14,600		14,600
Current amortization expense					500
Acquisition costs					5,400
Customer relationships and brand names
Business Combination
Intangible assets, net of accumulated amortization			86,800		86,800
Current amortization expense			$ 1,100	$ 1,200	$ 2,200	$ 2,200