Accrued Expenses and Other Liabilities

12 Months Ended

Dec. 31, 2022

Accrued Liabilities and Other Liabilities [Abstract]

Accrued Expenses and Other Liabilities

8. Accrued expenses and other liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	December 31,
	2022		2021
Accrued external research and development expenses	$	11,230	$	9,273
Accrued payroll and related expenses		12,312		8,521
Accrued milestone payments		85		2,058
Accrued professional fees		2,263		854
Accrued other		2,562		2,941
Accrued governmental rebates		2,300		—
Strimvelis liability - current portion		3,685		671
Total accrued expenses and other current liabilities	$	34,437	$	24,318