3. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

Schedule of Accrued Expenses and Other Current Liabilities 

During the first quarter of 2024, the Company cancelled accrued but unpaid bonuses that had been awarded for fiscal years 2022 and 2023, which has been accounted for as a change in estimate. The cancellation of bonuses reduced research and development expenses by $1.0 million and general and administrative expenses by $0.9 million for the six months ended March 31, 2024.