Corporate Restructuring	3 Months Ended
Mar. 31, 2021
Restructuring And Related Activities [Abstract]
Corporate Restructuring	10. Corporate Restructuring In September 2020, the Company’s board of directors implemented a corporate restructuring to align its resources on cellular senescence programs in ophthalmology and neurology while further extending operating capital. The restructuring resulted in an elimination of approximately 33 positions, or approximately 32% of the Company’s workforce, as of September 30, 2020. The Company incurred a one-time employee benefits and severance charge of approximately $1.8 million in operating expenses during the year ended December 31, 2020. The related accrual is recorded in accrued compensation on the condensed balance sheet at December 31, 2020. Restructuring charges incurred under this plan primarily consisted of employee termination benefits. Employee termination benefits include severance costs, employee-related benefits, and supplemental one-time termination payments. Charges and other costs related to the workforce reduction and structure realignment, and non-cash share-based compensation credits related to the forfeiture of stock options are included in operating expenses in the condensed statements of operations and comprehensive loss. Of the total charge, $1.5 million was recorded to research and development expenses and $0.3 million was recorded to general and administrative expenses during the year ended December 31, 2020. Substantially all cash payments were paid out in the first quarter of 2021. The Company may also incur additional costs not currently contemplated due to events that may occur as a result of, or that are associated with, the restructuring.

Corporate Restructuring

3 Months Ended

Mar. 31, 2021

Restructuring And Related Activities [Abstract]

10. Corporate Restructuring

In September 2020, the Company’s board of directors implemented a corporate restructuring to align its resources on cellular senescence programs in ophthalmology and neurology while further extending operating capital. The restructuring resulted in an elimination of approximately 33 positions, or approximately 32% of the Company’s workforce, as of September 30, 2020. The Company incurred a one-time employee benefits and severance charge of approximately $1.8 million in operating expenses during the year ended December 31, 2020. The related accrual is recorded in accrued compensation on the condensed balance sheet at December 31, 2020. Restructuring charges incurred under this plan primarily consisted of employee termination benefits. Employee termination benefits include severance costs, employee-related benefits, and supplemental one-time termination payments. Charges and other costs related to the workforce reduction and structure realignment, and non-cash share-based compensation credits related to the forfeiture of stock options are included in operating expenses in the condensed statements of operations and comprehensive loss. Of the total charge, $1.5 million was recorded to research and development expenses and $0.3 million was recorded to general and administrative expenses during the year ended December 31, 2020. Substantially all cash payments were paid out in the first quarter of 2021. The Company may also incur additional costs not currently contemplated due to events that may occur as a result of, or that are associated with, the restructuring.