Note 13 - Segment Information

12 Months Ended

Dec. 31, 2012

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, computing, consumer and industrial markets. The Company’s chief operating decision maker is its chief executive officer. The Company does not specifically allocate any of its resources to or measure the performance of, individual product families.

The Company derived a substantial majority of its revenue from sales to customers located outside North America during 2012, 2011 and 2010, with geographic revenue based on the customers’ ship-to location.

The following is a summary of revenue by geographic region based on customer ship-to location for the years ended December 31, 2012, 2011 and 2010 (in thousands):

	Year ended December 31,
Country	2012		2011		2010
China	$	124,278	$	113,469	$	105,233
Taiwan		27,477		23,634		25,840
South East Asia		21,641		14,789		10,219
Europe		16,201		14,416		20,416
Korea		9,434		14,183		33,761
Japan		8,516		10,681		14,255
USA		5,711		4,422		8,415
Other		555		925		701
Total	$	213,813	$	196,519	$	218,840

The following is a summary of net revenue by product family for the years ended December 31, 2012, 2011 and 2010 (in thousands):

	Year ended December 31,															Percent Change
Product Family	2012		% of Revenue			2011*		% of Revenue			2010*		% of Revenue			2012 to 2011 Change			2011 to 2010 Change
DC to DC Converters	$	188,736		88.3	%	$	170,032		86.5	%	$	190,286		87.0	%		11.0	%		(10.6	%)
Lighting Control Products		25,077		11.7	%		26,487		13.5	%		28,554		13.0	%		(5.3	%)		(7.2	%)
Total	$	213,813		100.0	%	$	196,519		100.0	%	$	218,840		100.0	%		8.8	%		(10.2	%)

* 2011 and 2010 revenue associated with Audio Amplifiers has been included with DC to DC Converters to conform with current year presentation.

The following is a summary of long-lived assets by geographic region, excluding restricted assets, as of December 31, 2012 and 2011 (in thousands):

	December 31,
	2012		2011
China	$	37,071	$	32,566
United States		23,163		15,662
Taiwan		90		98
Japan		57		70
Other		55		51
TOTAL	$	60,436	$	48,447