Collaboration and Licensing Agreements (Tables)

12 Months Ended

Dec. 31, 2022

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. The December 31, 2022 deferred revenue current and non-current balances are attributable entirely to prepayments for product supply under the 2017 KKC Agreement, while the December 31, 2021 current deferred revenue balance is attributable to the 2019 KKC Agreement and the December 31, 2021 non-current deferred revenue balance is attributable prepayments for product supply under the 2017 KKC Agreement (in thousands):

Deferred revenue - current	2022		2021
Balance at Balance at January 1,	$	—	$	4,177
Increases due to cash received, excluding amounts recognized as revenue during the period	42		—
Increases due to amounts reclassified from non-current, to be recognized in the next twelve months	3,961		—
Increases to amounts invoiced, for which cash has not yet been received	208		—
Decreases due to revenue recognized in the period for which cash has been received	—		(4,177)
Balance at December 31,	$	4,211	$	—

Deferred revenue - non-current	2022		2021
Balance at Balance at January 1,	$	4,727	$	—
Increases due to cash received during the period	7,794		3,242
Increases to amounts invoiced, for which cash has not yet been received	465		—
Increase due to unbilled prepayments recorded during the period	—		1,485
Decreases due to amounts reclassified as current, to be recognized in the next twelve months	(3,961)		—
Balance at December 31,	$	9,025	$	4,727