Other Balance Sheet Accounts

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Other Balance Sheet Accounts

6. OTHER BALANCE SHEET ACCOUNTS

Prepaid expenses and other current assets are composed of the following (in thousands):

	June 30,		December 31,
	2024		2023
Materials and supplies	$	19,224	$	12,476
Prepaid expenses		4,425		5,696
Other current assets		3,516		4,909
Total prepaid expenses and other current assets	$	27,165	$	23,081

Accrued expenses are composed of the following (in thousands):

	June 30,		December 31,
	2024		2023
Accrued salaries and other payroll liabilities	$	6,671	$	15,950
Accrued professional services		650		605
Accrued equipment and services liabilities for research and development		444		112
Accrued expenses—other		1,160		1,709
Total accrued expenses	$	8,925	$	18,376