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

6 Months Ended

Jun. 30, 2023

Notes Tables

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

	Three Months Ended June 30,						Six Months Ended June 30,
Customer	2023			2022			2023			2022
Distributor A		22	%		24	%		21	%		24	%
Distributor B		20	%		18	%		21	%		18	%
Distributor C		11	%		11	%		10	%		11	%

	June 30,			December 31,
Customer	2023			2022
Distributor A		27	%		29	%
Distributor B		22	%		23	%

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	2023		2022		2023		2022
China	$	216,172	$	249,778	$	441,224	$	455,858
Taiwan		70,212		69,668		119,045		126,105
South Korea		40,669		43,046		86,349		83,418
Europe		36,348		31,179		79,451		56,394
United States		27,571		23,973		58,588		37,419
Japan		28,288		22,136		59,103		41,291
Southeast Asia		21,708		21,114		48,140		38,002
Other		160		110		293		231
Total	$	441,128	$	461,004	$	892,193	$	838,718

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

	Three Months Ended June 30,				Six Months Ended June 30,
Product Family	2023		2022		2023		2022
Direct Current (“DC”) to DC	$	418,175	$	442,250	$	843,356	$	801,099
Lighting Control		22,953		18,754		48,837		37,619
Total	$	441,128	$	461,004	$	892,193	$	838,718

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

	June 30,		December 31,
Country	2023		2022
China	$	184,186	$	200,508
United States		116,816		113,996
Taiwan		19,093		20,074
Other		21,816		22,579
Total	$	341,911	$	357,157