Contingencies (Details) (USD $)	3 Months Ended		6 Months Ended				9 Months Ended	12 Months Ended			3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Medtronic Litigation [Member] patent	Jun. 30, 2013 Medtronic Litigation [Member]	Sep. 30, 2012 Medtronic Litigation [Member]	Dec. 31, 2013 Medtronic Litigation [Member]	Dec. 31, 2011 Medtronic Litigation [Member]	Mar. 31, 2013 Medtronic Litigation [Member]	Dec. 31, 2010 Trademark Infringement [Member]	Jun. 30, 2014 Trademark Infringement [Member]	Dec. 31, 2011 Trademark Infringement [Member]	Dec. 10, 2012 Trademark Infringement [Member]
Legal Proceedings (Textual) [Abstract]
Number of patents assigned or licensed					12
Number of patents withdrawn					3
Number of patents remaining					9
Company's Patents in Initial Phase of Litigation					1
Number of Patents Selected for Litigation					3
Other Company's Patents in Initial Phase of Litigation					3
Litigation award	$ 0	$ 0	$ 30,000,000	$ 0			$ 101,200,000		$ 101,200,000
RoyaltyAccrualCharge								7,900,000
TransferOfFundsNotAvailableForWithdrawalOrUse					25,000,000
Company's cash and investment in escrow								113,300,000					62,500,000
Approximate loss contingency										13,000,000
Unrecorded royalty damages					700,000
Loss Contingency, Settlement Agreement, Consideration						7,500,000
Jury award											60,000,000	30,000,000
Release of funds from escrow														$ 62,500,000