Accrued Expense	6 Months Ended
Jun. 30, 2019
Accrued Expense
Accrued Expense	6.Accrued Expense As of June 30, 2019, Current Liabilities included accrued expenses of $0.6 million, comprised primarily of clinical and preclinical expenses of $0.3 million accrued employee vacation and bonus 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

6 Months Ended

Jun. 30, 2019

6.Accrued Expense

As of June 30, 2019, Current Liabilities included accrued expenses of $0.6 million, comprised primarily of clinical and preclinical expenses of $0.3 million accrued employee vacation and bonus 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.