Development and License Agreements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended								3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Fresenius	Dec. 31, 2013 Fresenius	Sep. 30, 2014 Manufacturing Costs	Dec. 31, 2013 Manufacturing Costs	Sep. 30, 2014 Royalty	Dec. 31, 2013 Royalty	Sep. 30, 2014 Royalty Platelet system	Sep. 30, 2014 Royalty Plasma system
Licenses Agreements [Line Items]
Royalty rate applied towards sale of products											10.00%	3.00%
Royalty payments on products	$ 0.6	$ 0.8	$ 1.9	$ 2.3
Royalties owed							4.1	4.3	0.6	0.7
Prior written notice for termination of agreement			24 months		30 months
Revenue from sale of components	2.2		6.0
Payments made relating to the manufacturing of the products	4.3	4.2	13.9	11.8
Payments due relating to the manufacturing of products					$ 2.0	$ 0