Segment Information (Tables)

6 Months Ended

Jun. 30, 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				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
AmerisourceBergen Corp.	20	%	20	%	20	%	20	%
Cardinal Health, Inc.	20	%	17	%	20	%	18	%
McKesson Corp.	21	%	23	%	21	%	22	%