Significant Customer and Geographic Information - Concentration Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Merck | Sales | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	47.00%	29.00%	24.00%
GSK | Sales | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	22.00%	20.00%	17.00%
Exela | Sales | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage		12.00%	21.00%
Customer A | Accounts Receivable | Credit Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	54.00%	12.00%
Customer B | Accounts Receivable | Credit Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%
Customer C | Accounts Receivable | Credit Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	22.00%
Customer D
Concentration Risk [Line Items]
Accounts receivable - past due & future payments		$ 3.1
Customer D | Accounts Receivable | Credit Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	40.00%