Income Taxes - Summary of Net Deferred Income Tax Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss	$ 10,531	$ 31,414
Capitalized research and development	18,724	0
Capitalized organizational and start-up expenses	127	140
Licenses	461	1,875
Accrued expenses	1,977	968
Research and development credit	1,110	1,563
Equity-based compensation	12,087	8,584
Basis difference on gain on sale of Cullinan Pearl	1,805	0
Lease liability	1,345	0
Gross deferred tax assets	48,167	44,544
Valuation allowance	(46,766)	(44,552)	$ (22,642)
Net deferred tax asset	1,401	8
Deferred tax liability
ROU asset	1,108	0
Depreciation and amortization	(293)	(8)
Net deferred tax asset	$ 0	$ 0