Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2016
Summary of Significant Accounting Policies  
Schedule of estimated useful lives of property and equipment, net

                                                                                                                                                                                    

Laboratory equipment

 

5 years

Computer equipment and purchased software

 

3 years

Leasehold improvements

 

Shorter of asset's useful life or remaining term of lease