. SEGMENT AND GEOGRAPHIC INFORMATION

The Company operates in

one

reportable segment that includes the design, development, marketing and sale of high-performance analog solution

s for the consumer, computing and storage, industrial, automotive and communications markets. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company derives a majority of its revenue from sales to customers located outside North America, with geographic revenue based on the customers’ ship-to locations.

The Company sells its products primarily through

third

-party distributors and value-added resellers, and directly to original equipment manufacturers, original design manufacturers and electronic manufacturing service providers. The following table summarizes

one

customer with sales greater than

10%

of the Company's total revenue:

	Three Months Ended June 30,						Six Months Ended June 30,
Customer	2017			2016			2017			2016
Distributor A		17	%		24	%		17	%		22	%

The following table summarizes

two

customers with accounts receivable balances greater than

10%

of the Company

’s total accounts receivable:

	June 30,			December 31,
Customer	2017			2016
Distributor A		20	%		19	%
Distributor B		14	%		17	%

Both of the customers are

third

-party distributors. The Company

’s agreements with these distributors were made in the ordinary course of business and

may

be terminated with or without cause by these distributors with advance notice. Although the Company

may

experience a short-term disruption in the distribution of its products and a short-term decline in revenue if its agreement with either of these distributors was terminated, the Company believes that such termination would

not

have a material adverse effect on its financial statements because it would be able to engage alternative distributors, resellers and other distribution channels to deliver its products to end customers within a few quarters following the termination of the agreement with the distributor.

The following is a summary of revenue by geographic regions (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
Country or Region	2017		2016		2017		2016
China	$	62,325	$	60,928	$	118,409	$	113,316
Taiwan		17,286		10,160		32,161		19,015
Europe		9,593		7,054		17,501		14,039
Korea		8,154		7,024		16,315		14,117
Southeast Asia		6,925		3,501		13,297		7,840
Japan		4,945		3,037		9,771		5,687
United States		2,888		2,303		4,930		4,449
Other		82		72		176		128
Total	$	112,198	$	94,079	$	212,560	$	178,591

The following is a summary of revenue by product family (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
Product Family	2017		2016		2017		2016
DC to DC	$	102,187	$	84,221	$	193,611	$	161,339
Lighting Control		10,011		9,858		18,949		17,252
Total	$	112,198	$	94,079	$	212,560	$	178,591

The following is a summary of long-lived assets by geographic regions (in thousands):

	June 30,		December 31,
Country	2017		2016
United States	$	59,749	$	50,242
China		46,598		45,728
Taiwan		16,940		8,919
Bermuda		8,548		9,573
Other		424		571
Total	$	132,259	$	115,033