Note 6 - Segment and Geographic Information

3 Months Ended

Mar. 31, 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, 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 March 31,
Customer	2016			2015
Distributor A		20	%		25	%

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

	March 31,			December 31,
Customer	2016			2015
Distributor A		20	%		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 the agreement with the distributor.

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

	Three Months Ended March 31,
Country or Region	2016		2015
China	$	52,388	$	45,802
Taiwan		8,855		11,029
Korea		7,093		4,245
Europe		6,985		5,115
Southeast Asia		4,338		3,739
Japan		2,650		1,885
United States		2,146		1,693
Other		57		30
Total	$	84,512	$	73,538

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

	Three Months Ended March 31,
Product Family	2016		2015
DC to DC products	$	77,118	$	66,297
Lighting control products		7,394		7,241
Total	$	84,512	$	73,538

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

	March 31,		December 31,
Country	2016		2015
China	$	42,187	$	40,738
United States		41,459		40,405
Bermuda		11,111		11,624
Other		775		557
Total	$	95,532	$	93,324