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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
0 Months Ended 9 Months Ended 12 Months Ended
May 28, 2013
Aug. 21, 2012
May 27, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Advertising expense       $ 880,000 $ 1,500,000 $ 948,000
ESPP, percentage of discounted price from market price       85.00%    
Increase in quarterly cash dividend, percentage 10.00%          
Quarterly cash dividend per share of common stock outstanding approved $ 0.0275 $ 0.025 $ 0.025 $ 0.108 $ 0.050  
Allowance for doubtful accounts       356,000 528,000  
Write-downs to deferred preservation costs       448,000 195,000 270,000
Write-down to inventory       1,200,000 77,000 0
Minimum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Estimated useful lives       3 years    
Maximum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Estimated useful lives       10 years    
Stock Options, RSAs, RSUs, And PSUs [Member] | Minimum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       1 year    
Stock Options, RSAs, RSUs, And PSUs [Member] | Maximum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       3 years    
Stock Options [Member] | Maximum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Period within grant date stock options granted typically expire       7 years    
BioGlue Accessory Product [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Write-down to inventory       684,000    
Obsolete Revascularization Technologies Handpieces [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Write-down to inventory       $ 483,000