License, Collaboration, and Funding Agreements - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jul. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Collaboration License And Funding Arrangements [Line Items]
Other income		$ 41	$ 0
License revenue		$ 3,000	$ 0
AUSTRIA
Collaboration License And Funding Arrangements [Line Items]
Grant income (in percentage)		14.00%
Research and Development Incentive
Collaboration License And Funding Arrangements [Line Items]
Grant receivable		$ 400
Other income		86
Abbisko Agreement
Collaboration License And Funding Arrangements [Line Items]
Potential milestone payments receivable		208,000
One time upfront payment	$ 3,000
License revenue		3,000
Accounts receivable		$ 3,000