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

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Three Months Ended March 31,
Customer	2023			2022
Distributor A		20	%		24	%
Distributor B		21	%		18	%
Distributor C		*			11	%

	March 31,			December 31,
Customer	2023			2022
Distributor A		22	%		29	%
Distributor B		23	%		23	%

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

	Three Months Ended March 31,
Country or Region	2023		2022
China	$	225,052	$	206,079
Taiwan		48,833		56,437
South Korea		45,680		40,373
Europe		43,103		25,215
United States		31,017		13,446
Japan		30,815		19,155
Southeast Asia		26,432		16,889
Other		133		120
Total	$	451,065	$	377,714

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

	Three Months Ended March 31,
Product Family	2023		2022
Direct Current (“DC”) to DC	$	425,181	$	358,849
Lighting Control		25,884		18,865
Total	$	451,065	$	377,714

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

	March 31,		December 31,
Country	2023		2022
China	$	196,790	$	200,508
United States		115,363		113,996
Taiwan		19,812		20,074
Other		22,348		22,579
Total	$	354,313	$	357,157