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				Nine Months Ended
	October 2, 2020		September 27, 2019		October 2, 2020		September 27, 2019
Non-consignment sales	$	42,535	$	34,696	$	96,381	$	98,518
Consignment sales		4,546		4,359		21,081		12,784
Total net sales	$	47,081	$	39,055	$	117,462	$	111,302

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				Nine Months Ended
	October 2, 2020		September 27, 2019		October 2, 2020		September 27, 2019
Domestic	$	1,477	$	1,783	$	4,098	$	5,849
Foreign:
China		23,301		18,361		53,619		49,526
Japan		9,208		7,345		24,973		19,139
Other⁽¹⁾		13,095		11,566		34,772		36,788
Total foreign sales		45,604		37,272		113,364		105,453
Total net sales	$	47,081	$	39,055	$	117,462	$	111,302

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				Nine Months Ended
	October 2, 2020		September 27, 2019		October 2, 2020		September 27, 2019
ICLs	$	41,493	$	33,815	$	101,561	$	96,033
Other product sales
IOLs		3,325		4,093		9,880		11,984
Other surgical products		2,263		1,147		6,021		3,285
Total other product sales		5,588		5,240		15,901		15,269
Total net sales	$	47,081	$	39,055	$	117,462	$	111,302

One customer, the Company’s distributor in China, accounted for 49% and 46% of net sales for the three and nine months ended October 2, 2020, respectively, and the same customer, accounted for 47% and 44% of net sales for the three and nine months ended September 27, 2019, respectively. As of October 2, 2020 and January 3, 2020, respectively, one customer, the Company’s distributor in China, accounted for 59% and 43% of consolidated trade receivables.