Royalty Agreements Royalty Agreements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Datascope Royalty Agreement [Member]
Current Royalty Rate	5.00%
Minimum Royalty Payment	$ 50
Royalty Expense	50
BioSphere APHP Royalty [Member]
Current Royalty Rate	5.00%
Future Royalty Rate	2.50%
Royalty Expense	$ 1,300	$ 401