Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Impairment of clinical trial assets		$ 2,130	$ 0
Impairment of goodwill	$ 535	535	$ 0
Accrued contract termination costs	567	567		$ 0
Regenerative Medicine
Restructuring Cost and Reserve [Line Items]
Impairment of goodwill	535	535
June 2023 Restructuring
Restructuring Cost and Reserve [Line Items]
Severance arrangements	2,100	2,100
Impairment of clinical trial assets	2,100	2,100
Termination of Contract | June 2023 Restructuring
Restructuring Cost and Reserve [Line Items]
Accrued contract termination costs	$ 600	$ 600