Accounts Payable

12 Months Ended

Dec. 31, 2020

Accounts Payable

Accounts Payable

6.Accounts Payable

As of December 31, 2020, current liabilities included accounts payable of $0.1 million, comprised primarily of investor relations expenses and legal and patent fees of $0.1 million. As of December 31, 2019, current liabilities included accounts payable of $0.5 million, comprised primarily of amounts owed for external research expenses related to manufacturing costs of $0.3 million and legal and patent fees of $0.2 million.