Principal Business Activity and Significant Accounting Policies - (Details)	3 Months Ended
	Mar. 31, 2020 segment state location item
Principal Business Activity and Significant Accounting Policies
Number of points of distribution | item	60,000
Number of retail pharmacy locations | location	3,400
Number of states in which the entity provides veterinary services to pet owners | state	41
Number of reportable segments | segment	2