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Acquisitions - Schedule of Business Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 25, 2019
Aug. 23, 2018
Dec. 31, 2018
Dec. 31, 2019
Agilis        
Business Acquisition [Line Items]        
Cash consideration   $ 49,221    
Fair value of PTC common stock issued   155,860    
Estimated fair value of deferred consideration payable   38,100    
Estimated fair value of contingent consideration payable     $ 1,700  
Total consideration   $ 533,681    
BioElectron        
Business Acquisition [Line Items]        
Cash consideration $ 10,000      
Acquisition Costs, Cumulative       $ 10,500