Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2014
USD ($)
Dec. 03, 2014
USD ($)
Nov. 14, 2014
Dec. 31, 2015
USD ($)
Segment
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Summary Of Significant Accounting Policies [Line Items]              
Reverse stock split, number of shares converted to one share     10.804        
Number of operating segments | Segment       2      
Number of reporting segment | Segment       1      
Transfers between Levels 1, 2 and 3       $ 0 $ 0    
Cash and cash equivalents, carrying amount $ 58,527,000     30,915,000 58,527,000   $ 8,734,000
Cash and cash equivalents, fair value 49,750,000     25,764,000 49,750,000    
Impairment of intangible assets       $ 310,000 60,000    
Discount rate       13.00%      
IPO costs reclassified to additional paid-in capital   $ 3,911,000   $ 377,000 8,461,000    
Payments related to IPO         73,000    
Maximum percentage of recognition of tax benefits from uncertain tax positions       50.00%      
IPO [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Payments related to IPO 2,897,000            
Remaining amount of IPO costs included in accounts payable 1,014,000       1,014,000    
IPR&D [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Impairment of intangible assets       $ 310,000 60,000    
Intrexon [Member] | Promissory Note [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Promissory note, face amount           $ 10,000,000  
Quoted Prices in Active Markets (Level 1) [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Assets, fair value disclosure, recurring 0     0 0    
Liabilities, fair value disclosure, recurring 0     0 0    
Cash and cash equivalents, fair value 49,750,000     25,764,000 49,750,000    
Significant Other Observable Inputs (Level 2) [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Assets, fair value disclosure, recurring 0     0 0    
Liabilities, fair value disclosure, recurring 0     0 0    
Significant Unobservable Inputs (Level 3) [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Assets, fair value disclosure, recurring 0     0 0    
Liabilities, fair value disclosure, recurring 0     0 0    
Money Market [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Cash and cash equivalents, fair value 49,750,000     25,764,000 49,750,000    
Money Market [Member] | Quoted Prices in Active Markets (Level 1) [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Cash and cash equivalents, fair value $ 49,750,000     $ 25,764,000 $ 49,750,000