Segment Information

12 Months Ended

Dec. 31, 2021

Segment Information

Segment Information

3. 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)	2021		2020		2019
US	$	55,273	$	70,319	$	54,760
Europe		38		1,538		18,654
Total revenue	$	55,311	$	71,857	$	73,414

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)	2021		2020		2019
Viatris	79	%	63	%	44	%
Janssen	21	%	37	%	42	%
Pfizer	—		—		14	%