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Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2018

Concentrations of Credit Risk

Schedule of concentration of credit risk related to collaborative partners

		Percentage of Total Milestone and
		Contract Revenues for the
		Years Ended,
		December 31,
		2018		2017		2016
Collaboration Partner A		33	%	37	%	40	%
Collaboration Partner B		67	%	63	%	60	%

Schedule of concentration of credit risk related to specialty pharmacy customers

		Percentage of Total Net
		Product Revenues for the
		Years Ended,
		December 31,
		2018		2017		2016
Customer A		20	%	24	%	25	%
Customer B		14	%	15	%	17	%
Customer C		15	%	13	%	13	%
Customer D		11	%	8	%	9	%

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- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark, related to the collaborative partners.

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Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark, related to the specialty pharmaceutical customers.

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