Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses and Other Current liabilities

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Accrued Expenses and Other Current liabilities
 6 Months Ended
Jun. 30, 2024
Accrued Liabilities, Current [Abstract]  
Accrued Expenses and Other Current liabilities Accrued Expenses and Other Current liabilities
Accrued expenses consisted of the following (in thousands):
June 30,
2024		 December 31,
2023
Accrued property and equipment purchases $ 29,472  $ 29,433 
Accrued research and development costs 12,505  15,913 
Accrued professional fees 7,051  6,623 
ERC financing liability 9,013 — 
Operating lease liabilities, current portion 3,273 3,086 
Other accrued expenses 9,277  8,846 
Total accrued expenses and other current liabilities $ 70,591  $ 63,901 
The ERC financing liability represents the amount received in May 2024, in accordance with an agreement entered into with a third-party investor ("ERC Agreement") pursuant to which the investor purchased, for approximately $9.0 million in cash, the economic interest, at a discount, in our rights to payment from the Internal Revenue Service
("IRS") with respect to the employee retention credits for the nine month period ended September 30, 2021, as filed by the Company in January 2024 under the Coronavirus Aid, Relief, and Economic Security Act. The amount received by the Company pursuant to the ERC Agreement was recorded as an accrued liability, pending final determination by and receipt of such payment from the IRS.