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Development and License Agreements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Licenses Agreements [Line Items]
Royalty payments on products	$ 0.5	$ 0.6	$ 1.3	$ 1.3
Prior written notice for termination of agreement			24 months
Revenue from sale of components	0.5	1.1	$ 0.9	3.8
Payments made relating to the manufacturing of the products	4.7	$ 4.9	9.4	$ 9.5
Amounts due from Fresenius	0.8		$ 0.8		$ 1.3
Fresenius
Licenses Agreements [Line Items]
Prior written notice for termination of agreement			30 months
Royalty
Licenses Agreements [Line Items]
Royalties owed	0.7		$ 0.7		0.7
Royalty | Platelet system
Licenses Agreements [Line Items]
Royalty rate applied towards sale of products			10.00%
Royalty | Plasma system
Licenses Agreements [Line Items]
Royalty rate applied towards sale of products			3.00%
Manufacturing Costs
Licenses Agreements [Line Items]
Royalties owed	$ 2.5		$ 2.5		$ 5.1

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- Definition

Licenses Agreements [Line Items]

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Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of account and note receivables due from other than related parties.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.

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