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

9 Months Ended

Sep. 30, 2023

Notes Tables

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

	Three Months Ended September 30,						Nine Months Ended September 30,
Customer	2023			2022			2023			2022
Distributor A		27	%		25	%		23	%		24	%
Distributor B		21	%		18	%		21	%		18	%
Distributor C		11	%		10	%		10	%		11	%

	September 30,			December 31,
Customer	2023			2022
Distributor A		37	%		29	%
Distributor B		17	%		23	%

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Country or Region	2023		2022		2023		2022
China	$	234,924	$	265,053	$	676,148	$	720,911
Taiwan		103,537		58,920		222,582		185,025
South Korea		41,698		52,613		128,047		136,031
Europe		29,827		44,885		109,278		101,279
United States		23,565		24,965		82,153		62,384
Japan		18,605		22,399		77,708		63,690
Southeast Asia		22,538		26,458		70,678		64,460
Other		173		125		466		356
Total	$	474,867	$	495,418	$	1,367,060	$	1,334,136

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Product Family	2023		2022		2023		2022
Direct Current (“DC”) to DC	$	447,394	$	462,982	$	1,290,750	$	1,264,081
Lighting Control		27,473		32,436		76,310		70,055
Total	$	474,867	$	495,418	$	1,367,060	$	1,334,136

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

	September 30,		December 31,
Country	2023		2022
China	$	182,646	$	200,508
United States		118,957		113,996
Taiwan		32,956		20,074
Other		23,667		22,579
Total	$	358,226	$	357,157