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Prepaid and Other Current Assets (Tables)

3 Months Ended

Mar. 31, 2024

Prepaid Expense and Other Assets, Current [Abstract]

Summary of Prepaid and Other Current Assets

Prepaid and other current assets consisted of the following as of March 31, 2024 and December 31, 2023 (in thousands):

		March 31,				December 31,
		2024				2023
Down payments for inventory			13,828				16,296
Prepaid research and development			12,626				13,931
Other prepaid expenses			16,709				8,593
Total prepaid expenses		$	43,163			$	38,820

		March 31,				December 31,
		2024				2023
Royalties receivable		$	4,499			$	3,054
Receivable from collaboration agreement(1)			—				15,000
Deposits and other current assets			7,620				4,354
Total other current assets		$	12,119			$	22,408

(1) In January 2024 the Company waived the remaining reimbursement payment of $15.0 million from Sobi in connection with the decision to discontinue the cold agglutinin disease (CAD) program.

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- Definition

Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.

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