License and Collaboration Agreement - Additional Information (Details)	3 Months Ended
	Mar. 31, 2021 USD ($)
Research And Development Arrangement Contract To Perform For Others [Line Items]
Additional payments received	$ 0
Immedica Pharma AB
Research And Development Arrangement Contract To Perform For Others [Line Items]
Non refundable payment received	$ 21,500,000
Percentage of payment for cost incurred in PIP trial	50.00%
Costs incurred in performing PIP the trial	$ 1,800,000
Additional payments received	130,000,000.0
Milestone payments received	$ 130,000,000.0
Rate Of revenue share	20.00%
Upfront payment	$ 21,500,000
Transaction price	23,300
Allocation price net	12,000.0
Immedica Pharma AB | PEACE Trial
Research And Development Arrangement Contract To Perform For Others [Line Items]
Allocated amount of transaction price	7,200,000
Immedica Pharma AB | BLA Package
Research And Development Arrangement Contract To Perform For Others [Line Items]
Allocated amount of transaction price	7,200,000
Immedica Pharma AB | PIP Trial
Research And Development Arrangement Contract To Perform For Others [Line Items]
Allocated amount of transaction price	$ 4,100,000
Immedica Pharma AB | Maximum
Research And Development Arrangement Contract To Perform For Others [Line Items]
Percentage of payment for cost incurred in PIP trial	50.00%
License Agreements | Immedica Pharma AB
Research And Development Arrangement Contract To Perform For Others [Line Items]
Research agreement date	2021-03