Business acquisition - Change in contingent consideration (Details) $ in Thousands	10 Months Ended
	Sep. 30, 2022 USD ($)
Business Combination, Contingent Consideration Arrangements, Change In Amount Of Contingent Consideration, Liability [Roll Forward]
Balance at September 30, 2022	$ 11,692
AbX Biologics, Inc.
Business Combination, Contingent Consideration Arrangements, Change In Amount Of Contingent Consideration, Liability [Roll Forward]
Balance at December 1, 2021 – acquisition date	20,664
Change in fair value during the period	(13,471)
Balance at September 30, 2022	7,193
Contingent consideration \| AbX Biologics, Inc.
Business Combination, Contingent Consideration Arrangements, Change In Amount Of Contingent Consideration, Liability [Roll Forward]
Balance at December 1, 2021 – acquisition date	8,500
Change in fair value during the period	(6,400)
Balance at September 30, 2022	2,100
Holdbacks \| AbX Biologics, Inc.
Business Combination, Contingent Consideration Arrangements, Change In Amount Of Contingent Consideration, Liability [Roll Forward]
Balance at December 1, 2021 – acquisition date	12,164
Change in fair value during the period	(7,071)
Balance at September 30, 2022	$ 5,093