CONCENTRATION OF RISK

12 Months Ended

Dec. 31, 2015



15.	CONCENTRATION OF RISK:

Included in technology development and support revenue in the accompanying statement of income is $0.2 million, $0.1 million and $1.1 million for the years ended December 31, 2015, 2014 and 2013, respectively, of revenue which was derived from contracts with United States government agencies. Revenues derived from contracts with United States government agencies represented approximately less than 1% of the consolidated revenue for the years ended December 31, 2015, 2014 and 2013, respectively.

Revenues and accounts receivable from the Company's largest non-government customers for the years ended December 31 were as follows (in thousands):



	2015			2014			2013
Customer	% of Total Revenue⁽¹⁾	Accounts Receivable		% of Total Revenue⁽¹⁾	Accounts Receivable		% of Total Revenue⁽¹⁾	Accounts Receivable
A	62%	$	13,355	54%	$	8,550	60%	$	7,337
B	25%	8,477		19%	7,598		9%	4,743
C	5%	198		18%	953		22%	2,905

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(1) Materials sold to Customer C are eventually purchased by Customer A.

Revenues from outside of North America represented approximately 99% of the consolidated revenue for the years ended December 31, 2015, 2014 and 2013, respectively. Revenues by geographic area are as follows (in thousands):



Country	2015		2014		2013
South Korea	$	168,267	$	141,922	$	102,948
Japan	16,542		44,903		40,539
Taiwan	2,175		1,596		904
Other non-U.S. locations	2,844		1,904		696
Total non-U.S. locations	189,828		190,325		145,087
United States	1,218		706		1,552
Total revenue	$	191,046	$	191,031	$	146,639

The Company attributes revenue to different geographic areas on the basis of the location of the customer.

Long-lived assets (net), by geographic area are as follows (in thousands):



	2015		2014
United States	$	22,187	$	19,763
Other	220		159
Total long-lived assets	$	22,407	$	19,922

Substantially all chemical materials were purchased from one supplier. See Note 8.