Accrued Expense	9 Months Ended
Sep. 30, 2019
Accrued Expense
Accrued Expense	6.Accrued Expense As of September 30, 2019, Current Liabilities included accrued expenses of $0.6 million, comprised primarily of accrued employee vacation and bonus expenses of $0.3 million, clinical and preclinical expenses of $0.2 million and other accrued expenses of $0.1 million. As of December 31, 2018, Current Liabilities included accrued expenses of $0.7 million, comprised primarily of accrued clinical and preclinical expenses of $0.5 million, employee vacation and bonus expenses of $0.1 million and legal and professional fees of $0.1 million.

Accrued Expense

9 Months Ended

Sep. 30, 2019

6.Accrued Expense

As of September 30, 2019, Current Liabilities included accrued expenses of $0.6 million, comprised primarily of accrued employee vacation and bonus expenses of $0.3 million, clinical and preclinical expenses of $0.2 million and other accrued expenses of $0.1 million. As of December 31, 2018, Current Liabilities included accrued expenses of $0.7 million, comprised primarily of accrued clinical and preclinical expenses of $0.5 million, employee vacation and bonus expenses of $0.1 million and legal and professional fees of $0.1 million.