Accrued Expense	3 Months Ended
Mar. 31, 2020
Accrued Expense
Accrued Expense	6.Accrued Expense As of March 31, 2020, current liabilities included accrued expenses of $0.7 million, comprised primarily of accrued employee vacation and bonus expenses of $0.4 million, preclinical and other external research expenses of $0.1 million, legal and patent fees of $0.1 million and other accrued expenses of $0.1 million. As of December 31, 2019, current liabilities included accrued expenses of $0.7 million, comprised primarily of accrued employee vacation and bonus expenses of $0.4 million, clinical and preclinical expenses of $0.2 million and other accrued expenses of $0.1 million.

Accrued Expense

3 Months Ended

Mar. 31, 2020

6.Accrued Expense

As of March 31, 2020, current liabilities included accrued expenses of $0.7 million, comprised primarily of accrued employee vacation and bonus expenses of $0.4 million, preclinical and other external research expenses of $0.1 million, legal and patent fees of $0.1 million and other accrued expenses of $0.1 million. As of December 31, 2019, current liabilities included accrued expenses of $0.7 million, comprised primarily of accrued employee vacation and bonus expenses of $0.4 million, clinical and preclinical expenses of $0.2 million and other accrued expenses of $0.1 million.