Segment Reporting (Revenue by Product Line) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue from External Customer [Line Items]
Revenue	$ 39,614	$ 37,675
Disposable Products
Revenue from External Customer [Line Items]
Revenue	34,491	32,272
Disposable Products | Vascular intervention
Revenue from External Customer [Line Items]
Revenue	20,021	17,193
Disposable Products | Lead management
Revenue from External Customer [Line Items]
Revenue	14,470	15,079
Service and other, net of allowance for sales returns
Revenue from External Customer [Line Items]
Revenue	2,769	2,878
Equipment sales and rentals
Revenue from External Customer [Line Items]
Revenue	2,354	2,525
U.S. Medical
Revenue from External Customer [Line Items]
Revenue	31,772	30,791
U.S. Medical | Disposable Products
Revenue from External Customer [Line Items]
Revenue	28,582	26,949
U.S. Medical | Service and other, net of allowance for sales returns
Revenue from External Customer [Line Items]
Revenue	2,236	2,508
U.S. Medical | Equipment sales and rentals
Revenue from External Customer [Line Items]
Revenue	954	1,334
International Medical
Revenue from External Customer [Line Items]
Revenue	7,842	6,884
International Medical | Disposable Products
Revenue from External Customer [Line Items]
Revenue	5,909	5,323
International Medical | Service and other, net of allowance for sales returns
Revenue from External Customer [Line Items]
Revenue	533	370
International Medical | Equipment sales and rentals
Revenue from External Customer [Line Items]
Revenue	$ 1,400	$ 1,191