Note 6 - Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

6. 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 derives a substantial majority of its revenue from sales to customers located outside North America, with geographic revenue based on the customers’ ship-to location.

The following is a list of customers whose sales exceeded 10% of the Company’s total revenue:

	Three months ended June 30,						Six months ended June 30,
Customers	2013			2012			2013			2012
A		31	%		30	%		32	%		30	%
B		11	%		*			*			*

_______________

*Represents less than 10%.

Reflecting consolidations in recent years among distributors, the Company corrected the 2012 amounts reported in the table above from the amounts previously reported to disclose a group of entities under common control as a single customer, rather than as separate customers. Under the corrected disclosure, Customer A is reported as representing 30% of the Company's total revenue for the three months ended June 30, 2012 (rather than as three separate customers representing 16%, 13% and 1% of revenue), and 30% of the Company’s total revenue for the six months ended June 30, 2012 (rather than as three separate customers representing 15%, 14% and 1% of revenue). This correction had no impact on the Company's condensed consolidated balance sheet, condensed consolidated statements of operations, condensed consolidated statements of cash flows or condensed consolidated statements of comprehensive income.

The following is a summary of revenue by geographic regions (in thousands):

	Three months ended June 30,				Six months ended June 30,
Country and Region	2013		2012		2013		2012
China	$	34,743	$	35,091	$	61,522	$	64,184
Taiwan		8,321		7,820		15,840		14,235
Europe		3,327		3,793		7,277		7,983
Korea		2,408		2,600		4,826		4,559
USA		1,839		1,601		3,740		2,713
Japan		1,640		2,355		3,161		4,661
Rest of Asia		5,385		5,295		12,714		10,349
Other		51		52		104		407
Total	$	57,714	$	58,607	$	109,184	$	109,091

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

	Three months ended June 30,				Six months ended June 30,
Product Family	2013		2012		2013		2012
DC to DC converters	$	50,536	$	51,165	$	96,978	$	95,507
Lighting control products		7,178		7,442		12,206		13,584
Total	$	57,714	$	58,607	$	109,184	$	109,091

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

	June 30, 2013		December 31, 2012
China	$	43,553	$	37,071
USA		24,531		23,163
Taiwan		83		90
Japan		43		57
Other		65		55
Total	$	68,275	$	60,436