Note 13. Segment, Geographic, Product and Significant Customer Information

The Company has one operating segment, which is the sale, design, manufacture, marketing and support of optical critical dimension and thin film systems. The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):

	Three Months Ended				Six Months Ended
	July 1, 2017		June 25, 2016		July 1, 2017		June 25, 2016
Total net revenues^(1):
South Korea	$	31,500	$	4,468	$	50,119	$	12,904
Japan		9,267		6,379		12,620		13,567
United States		8,297		8,904		21,870		16,095
China		7,330		13,009		14,017		19,515
Taiwan		4,878		5,151		16,711		10,629
Singapore		963		16,617		2,454		26,519
Other		2,192		1,239		5,950		4,027
Total net revenues	$	64,427	$	55,767	$	123,741	$	103,256

	July 1, 2017		December 31, 2016
Long-lived tangible assets:
United States	$	40,626	$	42,688
International		1,392		1,538
Total long-lived tangible assets	$	42,018	$	44,226

The following customers accounted for 10% or more of total accounts receivable, net:

	At
	July 1, 2017		December 31, 2016
Samsung Electronics Co. Ltd.		20%		14%
SK Hynix		18%	***
Micron Technology, Inc.		13%		12%
Taiwan Semiconductor Manufacturing Company Limited	***			20%
Intel Corporation	***			11%
Toshiba Corporation	***			10%

***	The customer accounted for less than 10% of total accounts receivable, net, as of that period end.

The following customers accounted for 10% or more of total net revenues:

Three Months Ended

Six Months Ended

July 1, 2017

June 25, 2016

July 1, 2017

June 25, 2016

Samsung Electronics Co. Ltd.

30%

***

26%

***

SK Hynix

23%

***

18%

***

Taiwan Semiconductor Manufacturing Company Limited

***

11%

***

Intel Corporation

***

24%

11%

20%

Micron Technology, Inc.

***

36%

***

31%

Toshiba Corporation

10%

***

11%

***	The customer accounted for less than 10% of total net revenues during the period.