Note 7 - Segment and Geographic Information

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

7. 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 cloud computing, telecommunications, industrial and automotive, and consumer markets. The Company’s chief operating decision maker is its chief executive officer, who reviews financial information presented on a consolidated basis. 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, value-added resellers and directly to original equipment manufacturers, original design manufacturers, and electronic manufacturing service providers. The following table summarizes those customers with sales greater than 10% of the Company's total revenue:

	Three Months Ended September 30,						Nine Months Ended September 30,
Customers	2015			2014			2015			2014
Distributor A		24	%		26	%		24	%		26	%
Distributor B		*			10	%		*			10	%

* Represents less than 10%. 

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

	September 30,			December 31,
Customers	2015			2014
Distributor A		30	%		31	%
Distributor B		12	%		10	%

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	2015		2014		2015		2014
China	$	58,716	$	51,796	$	157,968	$	132,585
Taiwan		10,352		9,379		31,524		28,080
Korea		6,019		4,067		15,373		10,693
Europe		5,956		5,212		16,388		14,377
Southeast Asia		5,764		1,534		12,839		4,955
Japan		2,633		2,221		6,930		6,075
United States		1,673		4,079		4,932		9,913
Other		81		47		194		154
Total	$	91,194	$	78,335	$	246,148	$	206,832

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Product Family	2015		2014		2015		2014
DC to DC products	$	82,718	$	70,196	$	222,210	$	185,304
Lighting control products		8,476		8,139		23,938		21,528
Total	$	91,194	$	78,335	$	246,148	$	206,832

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

	September 30,		December 31,
Country	2015		2014
China	$	35,085	$	37,147
United States		35,966		33,913
Bermuda		12,137		13,383
Other		528		339
Total	$	83,716	$	84,782