Note 13 - Segment Information

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

13.  Segment Information 

As defined by the requirements of ASC 280-10-55, Segment Reporting – Overall – Implementation Guidance and Illustrations, the Company operates in one reportable segment that includes the design, development, marketing and sale of high-performance, mixed-signal analog semiconductors for the communications, storage and computing, consumer and industrial markets. The Company’s chief operating decision maker is its chief executive officer. 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 and Region	2013		2012		2011
China	$	141,400	$	124,278	$	113,469
Taiwan		34,248		27,477		23,634
Southeast Asia		21,760		21,641		14,789
Europe		15,351		16,201		14,416
Korea		9,992		9,434		14,183
United States		7,525		5,711		4,422
Japan		7,495		8,516		10,681
Other		320		555		925
Total	$	238,091	$	213,813	$	196,519

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

	Year Ended December 31,
Product Family	2013		2012			2011*
DC to DC products	$	211,337	$	188,736	$	170,032
Lighting control products		26,754		25,077		26,487
Total	$	238,091	$	213,813	$	196,519

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

	As of December 31,
	2013		2012
China	$	41,557	$	37,071
United States		24,719		23,163
Other		205		202
Total	$	66,481	$	60,436