Note 6 - Segment and Geographic Information

9 Months Ended

Sep. 30, 2016

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

6. SEGMENT AND GEOGRAPHIC INFORMATION

The Company operates in one reportable segment that includes the design, development, marketing and sale of high-performance power solutions for the communications, storage and computing, consumer and industrial 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 the only customer with sales greater than 10% of the Company's total revenue: 

	Three Months Ended September 30,						Nine Months Ended September 30,
Customer	2016			2015			2016			2015
Distributor A		22	%		24	%		22	%		24	%

The following table summarizes the only two customers with accounts receivable balances greater than 10% of the Company’s total accounts receivable:

	September 30,			December 31,
Customer	2016			2015
Distributor A		23	%		28	%
Distributor B		13	%		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 an agreement with the distributor.

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Country or Region	2016		2015		2016		2015
China	$	67,372	$	58,716	$	180,689	$	157,968
Taiwan		12,786		10,352		31,801		31,524
Korea		7,405		6,019		21,522		15,373
Europe		7,193		5,956		21,232		16,388
Southeast Asia		5,370		5,764		13,210		12,839
Japan		4,084		2,633		9,771		6,930
United States		2,164		1,673		6,613		4,932
Other		82		81		209		194
Total	$	106,456	$	91,194	$	285,047	$	246,148

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Product Family	2016		2015		2016		2015
DC to DC products	$	95,615	$	82,718	$	256,953	$	222,210
Lighting control products		10,841		8,476		28,094		23,938
Total	$	106,456	$	91,194	$	285,047	$	246,148

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

	September 30,		December 31,
Country	2016		2015
China	$	49,574	$	40,738
United States		42,752		40,405
Bermuda		20,185		11,624
Taiwan		8,617		126
Other		892		431
Total	$	122,020	$	93,324