Property And Equipment Net (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Property and equipment disclosures    
Property and equipment, gross $ 38,415 $ 2,759
Less: accumulated depreciation (1,343) (629)
Property and equipment, net 37,072 2,130
Construction-in-progress    
Property and equipment disclosures    
Property and equipment, gross 32,595  
Laboratory equipment    
Property and equipment disclosures    
Property and equipment, gross 4,734 2,215
Computer equipment    
Property and equipment disclosures    
Property and equipment, gross 726 447
Furniture and office equipment    
Property and equipment disclosures    
Property and equipment, gross 169 74
Leasehold improvements    
Property and equipment disclosures    
Property and equipment, gross $ 191 $ 23