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Long-Term Debt And Credit Facilities (Narrative) (Details) (USD $)
 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 07, 2013
Aug. 07, 2013
Convert Warrants [Member]
Aug. 08, 2013
Exchange Warrants [Member]
Dec. 31, 2013
Revolving Line Of Credit [Member]
Dec. 31, 2010
Term Note [Member]
Jan. 31, 2013
Healthcare Royalty Partners debt [Member]
Nov. 30, 2011
Healthcare Royalty Partners debt [Member]
Dec. 31, 2013
Healthcare Royalty Partners debt [Member]
May 31, 2012
Subordinated Convertible Debentures [Member]
item
Aug. 07, 2013
Unconverted Debentures [Member]
Dec. 31, 2011
Biosense Webster Advance [Member]
Jul. 31, 2008
Biosense Webster Advance [Member]
Dec. 31, 2013
2009 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
2009 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees From Stockholders [Member]
Dec. 31, 2013
November 2010 Agreement [Member]
Revolving Line Of Credit [Member]
Guarantees From Stockholders [Member]
Dec. 31, 2013
March 30, 2012 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
March 30, 2012 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
May 1, 2012 Agreement [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
May 1, 2012 Agreement [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
May 10, 2012 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
May 10, 2012 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
May 10, 2012 Amendment [Member]
Subordinated Convertible Debentures [Member]
Dec. 31, 2013
March 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
March 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
June 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
June 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
July 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
July 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
August 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Sep. 30, 2013
August 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
August 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
August 2013 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees Provided By Lenders [Member]
Dec. 31, 2013
September 2011 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
September 2011 Amendment [Member]
Term Note [Member]
Lender's Prime Rate [Member]
Dec. 31, 2013
September 2011 Amendment [Member]
Term Note [Member]
Bank's Prime Rate [Member]
Dec. 31, 2010
Principal Due 2013 [Member]
Term Note [Member]
Dec. 31, 2010
Principal Due 2012 [Member]
Term Note [Member]
Dec. 31, 2010
Principal Due 2011 [Member]
Term Note [Member]
Jul. 31, 2008
Research And Development Expenses [Member]
Biosense Webster Advance [Member]
Jul. 31, 2008
Royalty Amounts [Member]
Biosense Webster Advance [Member]
Jul. 31, 2008
Prime Rate Plus [Member]
Biosense Webster Advance [Member]
Dec. 31, 2013
Prime Rate Plus [Member]
2009 Amendment [Member]
Revolving Line Of Credit [Member]
Dec. 31, 2013
Prime Rate Plus [Member]
2009 Amendment [Member]
Revolving Line Of Credit [Member]
Guarantees From Stockholders [Member]
Dec. 31, 2010
Prime Rate Plus [Member]
2010 Amendment To Loan Agreement [Member]
Term Note [Member]
Debt Instrument [Line Items]                                                                                              
Maximum borrowing capacity                               $ 30,000,000 $ 10,000,000 $ 10,000,000   $ 10,000,000   $ 10,000,000 $ 13,000,000 $ 3,000,000     $ 3,000,000 $ 6,000,000 $ 3,000,000   $ 3,000,000 $ 3,000,000   $ 3,000,000 $ 0 $ 20,000,000                      
Debt maturity date                                   Mar. 31, 2012 Apr. 30, 2012 Apr. 30, 2012 May 15, 2012 May 15, 2012 Mar. 31, 2013 Mar. 31, 2013   Jun. 30, 2013 Jun. 30, 2013 Jul. 31, 2013 Jul. 31, 2013 Aug. 31, 2013 Aug. 31, 2013     Mar. 31, 2014                          
Interest rate added to prime rate                                                                         3.50% 5.50%           0.75% 1.75% 0.50% 3.50%
Accrued interest on facility, floor                               7.00% 6.00%                                                            
Decrease in maximum borrowing capacity                                     3,333,333                                                        
Earnings before interest and depreciation and amortization revolving credit convenant                                                               (3,000,000) (4,000,000)                            
Warrants 3,021,302 6,099,476           11,111       2,500,000           80,000                                                          
Number of shares issued upon conversion of warrants       262,450   1,400,000             2,500,000             75,735   60,976   234,305     113,636   48,387   14,313                                
Aggregate number of shares issued upon conversion         2,500,000 800,000             2,700,000                                                                    
Proceeds from the exercise of stock warrants         8,500,000                                                                                    
Exercise price of warrants               $ 36.00       $ 3.361 $ 3.361         $ 40.15   $ 6.60   $ 4.10   $ 3.361     $ 1.98   $ 1.55   $ 5.24                                
Fair value of warrants issued               228,332                   1,747,392                                                          
Current borrowing capacity             3,000,000                                                                                
Line of credit, current availability             3,000,000                                                                                
Paydown of the guarantees 7,000,000                                             7,000,000                                              
Line of credit facility, amount outstanding             0                                                                                
Term loan agreement, face value               10,000,000                                                                              
Term loan principal amount due                                                                             4,000,000 4,000,000 2,000,000            
Liquidity ratio                                                               2   2                          
Amount borrowed 2,546,328 2,500,000 14,317,397             15,000,000                                                                          
Additional amount which may be borrowed                   5,000,000                                                                          
Percentage of royalties entitled to                   100.00%                                                                          
Annual interest rate                   16.00%   8.00%                                                                      
Additional amount borrowed                 2,500,000   2,500,000                                                                        
Proceeds from Convertible Debt                       8,500,000                         18,500,000                                            
Conversion price per share                       $ 3.361                                                                      
Number of convertible shares                       2,500,000                                                                      
Debt discount                       7,600,000                                                                      
Fair value of warrants                       4,100,000                                                                      
Fair value of derivative liability                       3,500,000                                                                      
Write-off of unamortized discount 5,400,000                                                                                            
Advance on royalty amounts                             18,000,000                                                     8,000,000 10,000,000        
Research and development expenses, Biosense Webster                           1,100,000                                                                  
Disposables, service and accessories revenue, Biosense Webster                           $ 3,600,000