Customer, Supplier and Product Concentration (Tables)

12 Months Ended

Dec. 31, 2017

Schedules of Concentration of Risk, by Risk Factor

The following table sets forth the percentage of the Company’s gross and net sales and gross accounts receivable attributable to these three distributors for the periods indicated:



	2017			2016			2015
	Gross Sales	Net Revenue	Gross Accounts Receivable	Gross Sales	Net Revenue	Gross Accounts Receivable	Gross Sales	Net Revenue	Gross Accounts Receivable
Amerisource	23.6%	19.1%	26.3%	29.5%	23.3%	35.6%	28.0%	23.2%	28.8%
Cardinal	17.5%	17.9%	21.1%	15.4%	16.3%	15.1%	19.7%	19.5%	26.1%
McKesson	39.1%	26.5%	38.6%	32.5%	24.2%	33.2%	30.1%	27.3%	27.9%
Combined Total	80.2%	63.5%	86.0%	77.4%	63.8%	83.9%	77.8%	70.0%	82.8%