Geographic Information and Concentrations

12 Months Ended

Dec. 31, 2021

Risks and Uncertainties [Abstract]

Geographic Information and Concentrations

GEOGRAPHIC INFORMATION AND CONCENTRATIONS

Revenues are attributed to geographical areas based on the domicile of our collaboration partners. Our revenue by geographic areas for the years ended December 31, 2021, 2020 and 2019, are as follows (in thousands):

	Year Ended December 31,
	2021		2020		2019
United States	$	—	$	—	$	—
International:
North America (1)	13		806		—
Asia Pacific (2) (3)	10,084		6,765		5,281
Total revenue	$	10,097	$	7,571	$	5,281

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(1)Revenues from North America are comprised of amounts earned from Canada in accordance with the Knight Agreement.

(2)Revenues from Asia Pacific in 2021 and 2020 are comprised of amounts earned from Japan in accordance with the 2017 KKC Agreement and 2019 KKC Agreement.

(3)Revenues from Asia Pacific in 2019 were comprised of $0.8 million from Japan in accordance with the 2017 KKC Agreement and 2019 KKC Agreement, $1.5 million from Hong Kong in accordance with the XuanZhu Agreement and $3.0 million from China in accordance with the Fosun Agreement.

Revenues recorded in the years ended December 31, 2021, 2020 and 2019, were wholly from collaboration partnerships. Collaboration partnerships accounting for more than 10% of total revenues during the years ended December 31, 2021, 2020 and 2019 are as follows:

	Year Ended December 31,
	2021		2020		2019
KKC	100	%	89	%	15	%
Knight	—	%	11	%	—	%
Fosun Pharma	—	%	—	%	57	%
XuanZhu	—	%	—	%	28	%

Historically, we have not experienced credit losses from our accounts receivable. We have not recorded a reserve for credit losses as of December 31, 2021 and 2020.