Significant Acquisitions and Other Transactions (Narrative) (Details) (USD $)
3 Months Ended 12 Months Ended 6 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2015
Sep. 30, 2014
Jan. 31, 2015
Dec. 02, 2014
Business Acquisition [Line Items]                
Revenue Recognition, Multiple-deliverable Arrangements, Determination of Selling Price, Amount   $ 21,000,000 $ 0 $ 0        
Collaborative Arrangement, Aggregate Consideration, Up-front Payment   6,150,000 0 0        
Up-front payment to acquire intangible assets   9,250,000 0 0        
Useful life   17 years            
Gain on pooled patents agreement 22,850,000 22,850,000 0 0        
Forecast [Member]                
Business Acquisition [Line Items]                
Gain on pooled patents agreement         21,000,000      
Isis Innovation Limited [Member] | Patents [Member]                
Business Acquisition [Line Items]                
Up-front payment to acquire intangible assets           9,250,000    
Legal fees waived           2,100,000    
Royalties due waived           1,400,000    
Residual value           650,000    
Acquired patent value           10,600,000    
Useful life           3 years 6 months    
Illumina [Member] | Supply Agreement [Member]                
Business Acquisition [Line Items]                
Purchase commitment term   5 years            
Breach of contract, cure period   30 days            
Notice of bankruptcy, insolvency, receivership, liquidation or composition, cure period   60 days            
Illumina [Member] | Pooled Patents Agreement [Member]                
Business Acquisition [Line Items]                
Collaborative arrangement, consideration               50,000,000
Illumina [Member] | Pooled Patents Agreement [Member] | Subsequent Event [Member]                
Business Acquisition [Line Items]                
Proceeds from collaborators             6,000,000  
CUHK [Member] | Pooled Patents Agreement [Member]                
Business Acquisition [Line Items]                
Revenue Recognition, Multiple-deliverable Arrangements, Determination of Selling Price, Amount               43,850,000
Collaborative Arrangement, Aggregate Consideration, Up-front Payment               6,150,000
IVD Technology [Member] | CUHK [Member] | Pooled Patents Agreement [Member]                
Business Acquisition [Line Items]                
Revenue Recognition, Multiple-deliverable Arrangements, Determination of Selling Price, Amount               0
Settlements Of Claims And Disputes [Member] | CUHK [Member] | Pooled Patents Agreement [Member]                
Business Acquisition [Line Items]                
Revenue Recognition, Multiple-deliverable Arrangements, Determination of Selling Price, Amount               1,850,000
Physical Samples [Member] | CUHK [Member] | Pooled Patents Agreement [Member]                
Business Acquisition [Line Items]                
Revenue Recognition, Multiple-deliverable Arrangements, Determination of Selling Price, Amount               $ 21,000,000