Accrued Expenses

6 Months Ended

Jun. 30, 2022

Payables and Accruals [Abstract]

Accrued Expenses

. Accrued Expenses

A summary of the components of accrued expenses is as follows (in thousands):

	June 30, 2022		December 31, 2021
Accrued vendor liabilities	$	46,435	$	67,293
Accrued payroll	2,756		1,989
Accrued professional fees	2,550		3,579
Accrued interest	4,867		6,165
Accrued other	219		608
Total accrued expenses	$	56,827	$	79,634

Accrued expenses include amounts owed to vendors but not yet invoiced in exchange for vendor purchases and research and development services. Certain estimates of accrued vendor expenses are based on costs incurred to date.