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

9 Months Ended

Sep. 30, 2022

Notes Tables

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

	Three Months Ended September 30,						Nine Months Ended September 30,
Customer	2022			2021			2022			2021
Distributor A		25	%		24	%		24	%		26	%
Distributor B		18	%		15	%		18	%		16	%
Distributor C		10	%		12	%		11	%		*

	September 30,			December 31,
	2022			2021
Distributor A		27	%		26	%
Distributor B		18	%		17	%
Value-added reseller A		*			12	%

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	2022		2021		2022		2021
China	$	265,053	$	184,796	$	720,911	$	509,072
Taiwan		58,920		47,048		185,025		125,756
Europe		44,885		21,328		101,279		62,498
South Korea		52,613		24,442		136,031		62,721
Southeast Asia		26,458		14,820		64,460		38,506
Japan		22,399		20,944		63,690		47,546
United States		24,965		10,091		62,384		24,935
Other		125		53		356		260
Total	$	495,418	$	323,522	$	1,334,136	$	871,294

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

	Three Months Ended September 30,				Nine Months Ended September 30,
Product Family	2022		2021		2022		2021
Direct Current (“DC”) to DC	$	462,982	$	307,368	$	1,264,081	$	827,605
Lighting Control		32,436		16,154		70,055		43,689
Total	$	495,418	$	323,522	$	1,334,136	$	871,294

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

	September 30,		December 31,
Country	2022		2021
China	$	194,811	$	211,973
United States		112,982		113,805
Taiwan		18,787		19,607
Other		16,543		17,577
Total	$	343,123	$	362,962