Accrued expenses

9 Months Ended

Sep. 30, 2021

Accrued expenses

Accrued expenses

4. Accrued expenses

Accrued expenses consisted of the following:

(in thousands)	September 30, 2021		December 31, 2020
Deferred research obligations	$	141	$	—
Compensation and related benefits		1,107		845
Research and development		2,524		9
Professional fees		606		417
Other		94		101
	$	4,472	$	1,372