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Development and License Agreements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended					3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Fresenius	Jun. 30, 2014 Royalty	Dec. 31, 2013 Royalty	Jun. 30, 2014 Royalty Platelet system	Jun. 30, 2014 Royalty Plasma system	Jun. 30, 2014 Manufacturing Costs	Dec. 31, 2013 Manufacturing Costs
Licenses Agreements [Line Items]
Royalty rate applied towards sale of products								10.00%	3.00%
Royalty payments on products	$ 0.6	$ 0.7	$ 1.3	$ 1.6
Royalties owed						0.6	0.7			3.8	4.3
Prior written notice for termination of agreement			24 months		30 months
Revenue from sale of components	1.1		3.8
Payments made relating to the manufacturing of the products	$ 4.9	$ 3.6	$ 9.5	$ 7.6

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