Accounts Payable

6 Months Ended

Jun. 30, 2018

Accounts Payable Disclosure [Abstract]

Accounts Payable

5. Accounts Payable

As of June 30, 2018, Current Liabilities included accounts payable of $0.1 million, comprised primarily of amounts owed for legal fees and external research expenses. As of December 31, 2017, Current Liabilities included accounts payable of $0.1 million.