Products and Services (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Product Information [Line Items]
Total revenue	$ 73,083,000	$ 67,859,000
Total revenue percentage change (in hundredths)	8.00%	18.00%
Catheter Products [Member]
Product Information [Line Items]
Total revenue	45,621,000	39,344,000
Total revenue percentage change (in hundredths)	16.00%	31.00%
Hemostat Products [Member]
Product Information [Line Items]
Total revenue	17,236,000	17,542,000
Total revenue percentage change (in hundredths)	(2.00%)	(6.00%)
Vein Products [Member]
Product Information [Line Items]
Total revenue	9,964,000	7,694,000
Total revenue percentage change (in hundredths)	29.00%	(5.00%)
Total Product Revenue [Member]
Product Information [Line Items]
Total revenue	72,821,000	64,580,000
Total revenue percentage change (in hundredths)	13.00%	14.00%
License and Collaboration [Member]
Product Information [Line Items]
Total revenue	$ 262,000	$ 3,279,000
Total revenue percentage change (in hundredths)	(92.00%)	304.00%