Note 6 - Segment Information

3 Months Ended

Mar. 31, 2012

Segment Reporting Disclosure [Text Block]

6. Segment Information

As defined by the requirements of ASC 280-10-50 Segment Reporting – Overall - Disclosure, 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. Geographic revenue is based on the location to which customer shipments are delivered. For the three months ended March 31, 2012 and 2011, the Company derived substantially all of its revenue from sales to customers located outside North America. The following is a list of customers whose sales exceeded 10% of revenue for the three months ended March 31, 2012 and 2011.

	Three months ended March 31,
Customers	2012			2011
A		15	%		16	%
B		14	%		*

 (*) represents less than 10%

The following is a summary of revenue by geographic region based on customer ship-to location (in thousands):

	Three months ended March 31,
Country	2012		2011
China	$	29,093	$	23,677
Taiwan		6,415		5,129
Korea		1,959		4,427
Europe		4,190		3,475
Japan		2,306		2,978
USA		1,112		1,106
Other		5,409		3,676
Total	$	50,484	$	44,468

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

	Three months ended March 31,
Product Family	2012		2011
DC to DC Converters	$	44,342	$	38,580
Lighting Control Products		6,142		5,888
Total	$	50,484	$	44,468

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

	March 31, 2012		December 31, 2011
China	$	32,333	$	32,566
United States		19,533		15,662
Taiwan		98		98
Japan		64		70
Other		48		51
TOTAL	$	52,076	$	48,447

On July 8, 2011, the Company purchased the property located at 79 Great Oaks Boulevard in San Jose, California, to be used as its new headquarters and sales offices. The property consists of an approximately 106,262 square foot office building and approximately 5.5 acres of land. The $11.0 million purchase price for the property was allocated based on an independent third party valuation with $5.0 million attributable to the building and $6.0 million attributable to the land. The Company will begin to depreciate the building when it takes occupancy in May 2012. The increase of $3.9 million in the long-lived assets for the three months ended March 31, 2012 for the United States was primarily related to the building improvements at this new location. Buildings and building improvements have a depreciation life of up to 40 years.