Collaboration and Licensing Agreements (Tables)

12 Months Ended

Dec. 31, 2023

Collaboration and Licensing Agreements [Abstract]

Schedule of Deferred Revenue Balances

The following tables present changes in our current and non-current deferred revenue balances during the reporting period, which are all attributable to the 2017 Kyowa Kirin Agreement (in thousands):

	2023				2022
	Current		Non-Current		Current		Non-Current
Balance at January 1,	$	4,211	$	9,025	$	—	$	4,727
Amounts invoiced as prepayments for product supply	1,547		5,629		250		8,259
Decrease for revenue recognized for product supply	(4,586)		—		—		—
Reclassify amounts to be recognized in the next twelve months	6,010		(6,010)		3,961		(3,961)
Balance at December 31,	$	7,182	$	8,644	$	4,211	$	9,025