Note 7 - Segment, Significant Customers and Geographic Information

9 Months Ended

Sep. 30, 2020

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

7. SEGMENT, SIGNIFICANT CUSTOMERS AND GEOGRAPHIC INFORMATION

The Company operates in one reportable segment that includes the design, development, marketing and sale of high-performance analog solutions for the computing and storage, automotive, industrial, communications and consumer markets. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. 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 and value-added resellers, and directly to OEMs, ODMs and EMS providers. The following table summarizes those customers with sales equal to 10% or more of the Company's total revenue, or with accounts receivable balances equal to 10% or more of the Company’s total accounts receivable: 

	Revenue												Accounts Receivable
	Three Months Ended September 30,						Nine Months Ended September 30,						September 30,			December 31,
Customer	2020			2019			2020			2019			2020			2019
Distributor A		22	%		24	%		23	%		23	%		21	%		24	%
Distributor B		11	%		*			*			*			14	%		11	%
Value-added reseller A		*			*			*			*			11	%		13	%
Direct customer A		14	%		*			11	%		*			26	%		*

* Represents less than 10%.

The Company’s agreements with these third-party customers were made in the ordinary course of business and  may be terminated with or without cause by these customers 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 any of the distributors or the value-added reseller 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 short period following the termination of the agreement with the customer. If the Company's agreement with the direct customer was terminated, or if sales to such customer decrease significantly in future periods, the Company's operating results could be materially and adversely affected.

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Country or Region	2020		2019		2020		2019
China	$	157,215	$	105,857	$	375,708	$	276,892
Taiwan		40,782		18,547		79,644		55,912
Europe		14,255		12,047		40,770		38,071
South Korea		20,935		11,990		44,452		31,224
Southeast Asia		11,854		7,904		32,256		23,698
Japan		9,433		8,150		25,079		21,084
United States		4,880		4,225		13,298		14,044
Other		68		93		202		258
Total	$	259,422	$	168,813	$	611,409	$	461,183

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Product Family	2020		2019		2020		2019
DC to DC	$	247,561	$	159,723	$	580,549	$	432,125
Lighting Control		11,861		9,090		30,860		29,058
Total	$	259,422	$	168,813	$	611,409	$	461,183

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

	September 30,		December 31,
Country	2020		2019
China	$	143,848	$	113,888
United States		101,884		94,671
Taiwan		18,122		17,652
Other		6,456		2,104
Total	$	270,310	$	228,315