In the following tables, sales are disaggregated by category, sales by geographic market and sales by product data. The following breaks down sales into the following categories (in thousands):

	Three Months Ended				Six Months Ended
	July 2, 2021		July 3, 2020		July 2, 2021		July 3, 2020
Non-consignment sales	$	57,368	$	23,446	$	102,785	$	53,846
Consignment sales		4,999		11,748		10,334		16,535
Total net sales	$	62,367	$	35,194	$	113,119	$	70,381

The Company markets and sells its products in over 75 countries and conducts its manufacturing in the United States. Other than China and Japan, the Company does not conduct business in any country in which its sales exceed 10% of worldwide consolidated net sales. Sales are attributed to countries based on location of customers. The composition of the Company’s net sales to unaffiliated customers was as follows (in thousands):

	Three Months Ended				Six Months Ended
	July 2, 2021		July 3, 2020		July 2, 2021		July 3, 2020
Domestic	$	2,704	$	882	$	5,044	$	2,621
Foreign:
China		32,930		18,603		52,573		30,318
Japan		9,283		7,463		18,886		15,765
Other⁽¹⁾		17,450		8,246		36,616		21,677
Total foreign sales		59,663		34,312		108,075		67,760
Total net sales	$	62,367	$	35,194	$	113,119	$	70,381

100% of the Company’s sales are generated from the ophthalmic surgical product segment and the chief operating decision maker makes operating decisions and allocates resources based upon the consolidated operating results, and therefore the Company operates as one operating segment for financial reporting purposes. The Company’s principal products are implantable Collamer lenses (“ICLs”) used in refractive surgery and intraocular lenses (“IOLs”) used in cataract surgery. The composition of the Company’s net sales by product line was as follows (in thousands):

	Three Months Ended				Six Months Ended
	July 2, 2021		July 3, 2020		July 2, 2021		July 3, 2020
ICLs	$	59,235	$	30,728	$	105,736	$	60,068
Other product sales:
IOLs		3,074		2,561		6,799		6,555
Other surgical products		58		1,905		584		3,758
Total other product sales		3,132		4,466		7,383		10,313
Total net sales	$	62,367	$	35,194	$	113,119	$	70,381

One customer, the Company’s distributor in China, accounted for 53% and 46% of net sales for the three and six months ended July 2, 2021 and the same customer, accounted for 53% and 43% for the three and six months ended July 3, 2020, respectively. As of July 2, 2021 and January 1, 2021, respectively, one customer, the Company’s distributor in China, accounted for 55% and 46% of consolidated trade receivables.