Note 7 - Segment and Geographic Information

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

7. SEGMENT AND GEOGRAPHIC INFORMATION

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, who reviews financial information presented on a consolidated basis. 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 Company sells its products primarily through third-party distributors, value-added resellers and directly to original equipment manufacturers, original design manufacturers, and electronic manufacturing service providers. The following table summarizes those customers with sales greater than 10% of the Company's total revenue or accounts receivable balances greater than 10% of the Company’s total accounts receivable:

	Revenue						Accounts Receivable
	Three Months Ended March 31,						March 31,			December 31,
Customers	2015			2014			2015			2014
Distributor A		25	%		26	%		26	%		31	%
Distributor B		*			10	%		14	%		10	%

___________

* Represents less than 10%. 

Both of the customers are third-party distributors. The Company’s agreements with these distributors were made in the ordinary course of business and may be terminated with or without cause by these distributors with advance notice. Although the Company may experience a short-term disruption in the distribution of its products and a short-term decline in revenue if its agreement with either of these distributors was terminated, the Company believes that such termination would not have a material adverse effect on its financial statements because it would be able to engage alternative distributors, resellers and other distribution channels to deliver its products to end customers within a few quarters following the termination of an agreement with a distributor.

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

	Three Months Ended March 31,
Country or Region	2015		2014
China	$	45,802	$	36,859
Taiwan		11,029		9,064
Europe		5,115		4,591
Korea		4,245		2,736
Southeast Asia		3,739		2,013
Japan		1,885		2,141
United States		1,693		2,603
Other		30		54
Total	$	73,538	$	60,061

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

	Three Months Ended March 31,
Product Family	2015		2014
DC to DC products	$	66,297	$	53,935
Lighting control products		7,241		6,126
Total	$	73,538	$	60,061

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

	March 31,		December 31,
Country	2015		2014
China	$	38,593	$	37,147
United States		35,989		33,913
Bermuda		13,016		13,383
Other		363		339
Total	$	87,961	$	84,782