Income taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 21,935	$ 5,607
Guaranteed payments		1,702
Liability to licensor	4,159
Deferred revenue		4,159
Goodwill	3,449
Deferred rent		504
Lease liability	1,128
Accrued compensation	485	585
Research credit carryforwards	2,945	610
Stock-based compensation	697	438
Other	2	0
Gross deferred tax assets	34,800	13,605
Less valuation allowance	(33,351)	(12,768)
Total deferred tax assets	1,449	837
Deferred tax liabilities:
Fixed assets	(756)	(837)
Operating lease right-of-use asset	(693)
Total deferred tax liabilities	(1,449)	(837)
Net deferred tax assets	$ 0	$ 0