Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.4.0.3
Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Accounting Policies [Line Items]          
Fair value of notes payable $ 63,700,000   $ 63,700,000    
Notes payable 60,900,000   60,900,000    
Derivative liabilities $ 63,000   $ 63,000   $ 63,000
Non-refundable upfront cash payment received   $ 2,000,000      
Deferred revenue recognition period     2 years    
Cardinal Health [Member] | Customer Concentration Risk [Member] | Accounts and Other Receivable [Member]          
Accounting Policies [Line Items]          
Concentration risk, percentage 98.00%        
Cardinal Health [Member] | Customer Concentration Risk [Member] | Minimum [Member] | Lymphoseek sales [Member]          
Accounting Policies [Line Items]          
Concentration risk, percentage     99.00% 99.00%