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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2016
Feb. 24, 2017
Jun. 30, 2016
Document and Entity Information      
Entity Registrant Name PTC THERAPEUTICS, INC.    
Entity Central Index Key 0001070081    
Document Type 10-K    
Document Period End Date Dec. 31, 2016    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 230,565,407
Entity Common Stock, Shares Outstanding (in shares)   34,556,440  
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY