Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Total revenues	$ 190.6	$ 117.8
Operating expenses:
Cost of product sales and contract manufacturing	91.8	54.3
Research and development	46.1	29.1
Selling, general and administrative	65.4	40.0
Amortization of intangible assets	14.5	3.9
Total operating expenses	217.8	127.3
Loss from operations	(27.2)	(9.5)
Other income (expense):
Interest expense	(9.6)	(0.2)
Other income (expense), net	(1.0)	0.3
Total other income (expense), net	(10.6)	0.1
Loss before benefit from income taxes	(37.8)	(9.4)
Income tax benefit	(11.8)	(4.5)
Net loss	$ (26.0)	$ (4.9)
Net loss per common share
Basic (in dollars per share)	$ (0.51)	$ (0.10)
Diluted (in dollars per share)	$ (0.51)	$ (0.10)
Shares used in computing loss per share
Basic (in shares)	51,224,125	49,580,089
Diluted (in shares)	51,224,125	49,580,089
Product sales, net
Revenues:
Total revenues	$ 153.0	$ 75.8
Contract manufacturing
Revenues:
Total revenues	15.9	26.1
Contracts and grants
Revenues:
Total revenues	$ 21.7	$ 15.9