Note 16 - Segment and Geographic Information

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

16.  SEGMENT AND GEOGRAHPIC 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 following is a summary of revenue by geographic regions (in thousands):

	Year Ended December 31,
Country or Region	2015		2014		2013
China	$	213,119	$	181,050	$	141,400
Taiwan		41,521		38,460		34,248
Europe		22,603		19,830		15,351
Korea		20,519		14,362		9,992
Southeast Asia		18,592		13,993		21,760
Japan		9,727		8,251		7,495
United States		6,732		6,392		7,525
Other		254		197		320
Total	$	333,067	$	282,535	$	238,091

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

	Year Ended December 31,
Product Family	2015		2014		2013
DC to DC products	$	299,726	$	253,083	$	211,337
Lighting control products		33,341		29,452		26,754
Total	$	333,067	$	282,535	$	238,091

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

	December 31,
Country	2015		2014
China	$	40,738	$	37,147
United States		40,405		33,913
Bermuda		11,624		13,383
Other		557		339
Total	$	93,324	$	84,782