Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Summary of Revenue by Major Customers

The following table summarizes revenues from each of our customers who individually accounted for 10% or more of our total revenues (as a percentage of total revenues):

	Three Months Ended
	March 31,
	2018		2017
AmerisourceBergen Corp.	21	%	20	%
Cardinal Health, Inc.	21	%	18	%
McKesson Corp.	20	%	20	%