Revenue recognition (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The Company's revenues disaggregated by the major sources were as follows:

	Three Months Ended March 31, 2020						Three Months Ended March 31, 2019
	U.S. Government		Non-U.S. Government		Total		U.S. Government		Non-U.S. Government		Total
Product sales, net	$	63.9	$	84.3	$	148.2	$	73.3	$	79.7	$	153.0
Contract development and manufacturing services	—		21.7		21.7		—		15.9		15.9
Contracts and grants	22.0		0.6		22.6		20.4		1.3		21.7
Total revenues	$	85.9	$	106.6	$	192.5	$	93.7	$	96.9	$	190.6

Rollforward of Contract Liabilities

The following table presents the rollforward of the contract liability balances:

December 31, 2019	$	88.9
Deferral of revenue	6.4
Revenue recognized	(5.9		)
March 31, 2020	$	89.4

Schedule of Accounts Receivable, Net

Accounts receivable, including unbilled accounts receivable contract assets, consist of the following:

	March 31, 2020		December 31, 2019
Billed, net	$	119.4	$	227.3
Unbilled	43.1		43.4
Total, net	$	162.5	$	270.7