GEOGRAPHIC INFORMATION, PRODUCT GROUPS AND CUSTOMER CONCENTRATION

We evaluate our reportable segments in accordance with ASC Topic 280, Segment Reporting, which establishes standards for reporting information about operating segments, geographic areas and major customers in financial statements. During fiscal years 2018, 2017 and 2016, we had one operating segment in which we designed, manufactured and marketed optical components and modules for the long-haul, metro and data center markets.

Geographic Information

The following table shows revenues by geographic area for the fiscal years ended June 30, 2018, July 1, 2017 and July 2, 2016, based on the delivery locations of our products:



	Year Ended
	June 30, 2018		July 1, 2017		July 2, 2016
	(Thousands)
Asia-Pacific:
China	$	169,825	$	227,897	$	167,229
Thailand	64,206		97,808		11,161
Malaysia	5,461		20,965		31,823
Other Asia-Pacific	20,466		15,776		6,665
Total Asia-Pacific	$	259,958	$	362,446	$	216,878

Americas:
United States	$	78,858	$	82,516	$	63,158
Mexico	101,768		43,122		46,385
Other Americas	10,918		35,170		6,901
Total Americas	$	191,544	$	160,808	$	116,444

EMEA:
Italy	$	43,196	$	32,926	$	27,249
Germany	17,438		14,221		21,284
Other EMEA	24,840		21,050		18,918
Total EMEA	$	85,474	$	68,197	$	67,451

Japan	$	6,194	$	9,517	$	7,141

Total revenues	$	543,170	$	600,968	$	407,914

The following table sets forth our long-lived tangible assets by country as of the dates indicated:



	Year Ended
	June 30, 2018		July 1, 2017
	(Thousands)
Japan	$	61,845	$	49,843
China	23,126		25,010
United Kingdom	20,112		8,174
United States	14,956		11,057
Malaysia	8,651		10,521
Rest of world	8,748		9,728
	$	137,438	$	114,333

Product Groups

The following table sets forth revenues by product group for the fiscal years ended June 30, 2018, July 1, 2017 and July 2, 2016:



	Year Ended
	June 30, 2018		July 1, 2017		July 2, 2016
	(Thousands)
100 Gb/s + transmission modules	$	422,699	$	457,975	$	228,619
40 Gb/s and lower transmission modules	120,471		142,993		179,295
	$	543,170	$	600,968	$	407,914

Significant Customers and Concentration of Credit Risk

For the fiscal year ended June 30, 2018, four customers accounted for 10 percent or more of our revenues, representing 17 percent, 13 percent, 13 percent and 11 percent of our revenues, respectively. For the fiscal year ended July 1, 2017, four customers accounted for 10 percent or more of our revenues, representing 18 percent, 18 percent, 15 percent and 12 percent, of our revenues, respectively. For the fiscal year ended July 2, 2016, four customers accounted for 10 percent or more of our revenues, representing 21 percent, 13 percent, 10 percent and 10 percent, of our revenues, respectively.

As of June 30, 2018, two customers accounted for 10 percent or more or our accounts receivable, representing approximately 22 percent and 14 percent of our accounts receivable, respectively. As of July 1, 2017, one customer accounted for 10 percent or more of our accounts receivable, representing approximately 20 percent of our accounts receivable.