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Trade Receivables (Tables)

6 Months Ended

Jun. 30, 2022

Receivables [Abstract]

Summary of Receivables

Receivables from collaborations were as follows (in thousands):

			June 30, 2022
			Billed						Unbilled						Total
U.S. Department of Health and Human Services			$	—					$	1,303					$	1,303
Royalty receivables from partners			540						—						540
Total receivables			$	540					$	1,303					$	1,843

			December 31, 2021
			Billed						Unbilled						Total
U.S. Department of Health and Human Services			$	5					$	1,670					$	1,675
Royalty receivables from partners			305						—						305
Total receivables			$	310					$	1,670					$	1,980

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