Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended								0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Jul. 10, 2012	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Restricted Shares [Member]	Dec. 31, 2013 Biosense Webster Inc. [Member] Revenue [Member]	Dec. 31, 2012 Biosense Webster Inc. [Member] Revenue [Member]	Dec. 31, 2011 Biosense Webster Inc. [Member] Revenue [Member]	Dec. 31, 2012 Letter of Credit [Member]	Jul. 10, 2012 Minimum [Member]	Dec. 31, 2013 Minimum [Member]	Jul. 10, 2012 Maximum [Member]	Dec. 31, 2013 Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum borrowing capacity																	$ 100,000
Restricted cash		0				0				0	0
Property and equipment, useful life																			3 years		10 years
Intangible assets, useful life																			10 years		15 years
Reverse stock split	0.1																	0.25		0.10
Stock options and stock appreciation rights		188,947				373,899				188,947	373,899
Weighted average exercise price		$ 48.38				$ 43.90				$ 48.38	$ 43.90
Common stock issuable upon exercise of outstanding warrants		3,021,302				6,099,476				3,021,302	6,099,476
Weighted average exercise price of warrants or rights		$ 14.21								$ 14.21
Weighted average unearned restricted shares outstanding													33,058
Revenues		9,068,026	10,821,444	9,733,407	8,408,204	12,204,909	11,561,399	10,512,898	12,283,228	38,031,081	46,562,434	41,987,432		3,902,178	3,447,386	3,663,687
Major customer, revenue percentage														10.00%	7.00%	9.00%
Research and development receivable		$ 0				$ 0				$ 0	$ 0
Share based compensation, requisite service period																			1 year		4 years