Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Property and Equipment, Net Estimated Useful Lives

Property and equipment are recorded at cost and are depreciated and amortized over the shorter of their remaining lease term or their estimated useful lives on a straight-line basis as follows:

Laboratory equipment	4-7 years
Office equipment	3-5 years
Leasehold improvements	Lesser of life of improvement or lease term