Note 13 - Segment Information

12 Months Ended

Dec. 31, 2011

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, the design, development, marketing and sale of high-performance, mixed-signal analog semiconductors for the computing, consumer electronics and communications 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 2011, 2010 and 2009, 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, 2011, 2010 and 2009 (in thousands):

	Year ended December 31,
Country	2011		2010		2009
China	$	113,469	$	105,233	$	66,694
Taiwan		23,634		25,840		21,719
Europe		14,416		20,416		19,251
Korea		14,183		33,761		32,028
Japan		10,681		14,255		11,972
USA		4,422		8,415		6,106
Other		15,714		10,920		7,238
Total	$	196,519	$	218,840	$	165,008

The following is a summary of net revenue by product type for the years ended December 31, 2011, 2010 and 2009 (in thousands):

	Year ended December 31,
Product Family	2011		% of Revenue			2010		% of Revenue			2009		% of Revenue
DC to DC Converters	$	165,608		84.2	%	$	183,051		83.7	%	$	123,581		74.9	%
Lighting Control Products		26,487		13.5	%		28,554		13.0	%		27,836		16.9	%
Audio Amplifiers		4,424		2.3	%		7,235		3.3	%		13,591		8.2	%
Total	$	196,519		100.0	%	$	218,840		100.0	%	$	165,008		100.0	%

The following is a summary of long-lived assets by geographic region, excluding restricted assets, as of December 31, 2011 and 2010 (in thousands):

	December 31,
	2011		2010
China	$	32,566	$	34,468
United States		15,662		2,719
Taiwan		98		134
Japan		70		85
Other		51		58
TOTAL	$	48,447	$	37,464