Commitments and Contingencies - Additional Information (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended				9 Months Ended	1 Months Ended	9 Months Ended
	May 31, 2008	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2004 Scient'x [Member]	Jul. 31, 2005 Surgiview [Member]	Sep. 30, 2013 Eurosurgical [Member]	May 31, 2008 HealthpointCapital [Member] Scient'x [Member]	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Minimum [Member] HealthpointCapital [Member] Scient'x [Member]	Sep. 30, 2013 Maximum [Member]
Loss Contingencies [Line Items]
Capital leases expire date				Jun. 30, 2017
Lease interest rate										6.60%		9.60%
Rent expense		$ 0.9	$ 0.9	$ 2.9	$ 2.8
Judgment assessed by court				30				9
Business acquisition, percentage of interest acquired						33.10%	73.00%
Loss Contingency, Damages Sought, Value	$ 39								$ 39	$ 55	$ 55