Note 20 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Years Ended December 31
	2021		2020		2019
China	$	88,103	$	70,306	$	52,233
Singapore		2,598		1,216		648
Taiwan		2,325		2,579		2,016
Malaysia		2,138		1,895		1,287
Korea		2,109		719		950
Philippines		2,005		333		241
Japan		1,544		1,189		1,354
U.S.A.		23		22		2,077
Other		251		76		122
Total	$	101,096	$	78,335	$	60,928

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

	Years Ended December 31
	2021		2020		2019
Integrated Circuits
Analog	$	55,924	$	35,152	$	23,901
Mixed-signal		45,113		43,113		34,944
Digital		14		-		3
Licensing revenue		45		70		2,080
Total	$	101,096	$	78,335	$	60,928

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

	Years Ended December 31
	2021			2020			2019
Customer A		15	%		14	%		14	%
Customer B		8	%		11	%		12	%

Long-lived Assets by Geographic Areas [Table Text Block]

	December 31
	2021		2020		2019
Taiwan	$	9,977	$	8,859	$	7,621
China		9,602		4,171		3,661
U.S.A.		3,814		4,138		4,015
Other		218		98		254
Total	$	23,611	$	17,266	$	15,551