Note 7 - Segment, Significant Customers and Geographic Information (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
Customer	2022			2021			2022			2021
Distributor A		24	%		28	%		24	%		27	%
Distributor B		18	%		17	%		18	%		17	%
Distributor C		11	%		*			11	%		*

	June 30,			December 31,
	2022			2021
Distributor A		19	%		26	%
Distributor B		16	%		17	%
Value-added reseller A		21	%		12	%

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
Country or Region	2022		2021		2022		2021
China	$	249,778	$	170,893	$	455,858	$	324,276
Taiwan		69,668		48,262		126,105		78,708
Europe		31,179		20,790		56,394		41,170
South Korea		43,046		18,992		83,418		38,279
Southeast Asia		21,114		12,188		38,002		23,686
Japan		22,136		14,552		41,291		26,602
United States		23,973		7,542		37,419		14,844
Other		110		98		231		207
Total	$	461,004	$	293,317	$	838,718	$	547,772

Revenue from External Customers by Products and Services [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
Product Family	2022		2021		2022		2021
Direct Current (“DC”) to DC	$	442,250	$	278,808	$	801,099	$	520,237
Lighting Control		18,754		14,509		37,619		27,535
Total	$	461,004	$	293,317	$	838,718	$	547,772

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

	June 30,		December 31,
Country	2022		2021
China	$	209,016	$	211,973
United States		113,065		113,805
Taiwan		18,587		19,607
Other		16,019		17,577
Total	$	356,687	$	362,962