Segment Information

12 Months Ended

Dec. 31, 2020

Segment Information

Segment Information

4. Segment Information

The Company operates in a single segment, which is the discovery (research), development and commercialization of human therapeutics. The following table summarizes total revenue by geographic region:

	Year Ended December 31,
(In thousands)	2020		2019		2018
US	$	70,319	$	54,760	$	49,239
Europe		1,538		18,654		11,117
Asia		—		—		14
Total revenue	$	71,857	$	73,414	$	60,370

The following table summarizes total revenue from each of the Company’s customers or collaboration partners who individually accounted for 10% or more of total revenue (as a percentage of total revenues) during the most recent three years:

	Year Ended December 31,
(% of total revenue)	2020		2019		2018
Viatris	63	%	44	%	—
Janssen	37	%	42	%	51	%
Pfizer	—		14	%	—
Alfasigma	—		—		18	%