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 3, 2020		June 28, 2019		July 3, 2020		June 28, 2019
Non-consignment sales	$	23,446	$	35,556	$	53,846	$	63,822
Consignment sales		11,748		4,108		16,535		8,425
Total net sales	$	35,194	$	39,664	$	70,381	$	72,247

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 3, 2020		June 28, 2019		July 3, 2020		June 28, 2019
Domestic	$	882	$	2,114	$	2,621	$	4,066
Foreign:
China		18,603		19,394		30,318		31,165
Japan		7,463		6,275		15,765		11,794
Other⁽¹⁾		8,246		11,881		21,677		25,222
Total foreign sales		34,312		37,550		67,760		68,181
Total net sales	$	35,194	$	39,664	$	70,381	$	72,247

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 3, 2020		June 28, 2019		July 3, 2020		June 28, 2019
ICLs	$	30,728	$	34,432	$	60,068	$	62,218
Other product sales
IOLs		2,561		3,874		6,555		7,891
Other surgical products		1,905		1,358		3,758		2,138
Total other product sales		4,466		5,232		10,313		10,029
Total net sales	$	35,194	$	39,664	$	70,381	$	72,247

One customer, the Company’s distributor in China, accounted for 53% and 43% of net sales for the three and six months ended July 3, 2020, respectively, and the same customer, accounted for 49% and 43% of net sales for the three and six months ended June 28, 2019, respectively. As of July 3, 2020 and January 3, 2020, respectively, one customer, the Company’s distributor in China, accounted for 57% and 43% of consolidated trade receivables.