Note 14 Segment and Geographic Information (Tables)

9 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of Revenue from External Customers by Geographic Area [Table Text Block]

		Three Months Ended				Nine Months Ended
		December 31,				December 31,
			2014		2013	2014		2013
		(unaudited)				(unaudited)
United States		$	20,506	$	21,959	$	64,512	$	66,043
Europe and the Middle East
	France		2,208		1,097		5,957		3,729
	Germany		7,720		7,376		24,195		24,538
	Italy		1,189		1,280		3,571		3,274
	Russia		1,621		717		4,482		2,096
	Sweden		1,138		1,142		3,732		3,810
	United Kingdom		4,752		4,177		15,953		14,924
	Other		6,020		7,145		19,913		21,062
Asia Pacific
	China		20,949		27,631		61,831		62,572
	Japan		1,675		1,238		5,637		4,644
	Korea		4,661		5,503		16,789		12,807
	Malaysia		1,197		881		4,319		2,504
	Singapore		2,753		3,048		8,823		8,792
	Other		2,671		2,631		8,514		6,720
Rest of the World
	India		1,150		1,147		3,779		3,694
	Other		1,116		2,376		3,834		5,226
Total		$	81,326	$	89,348	$	255,841	$	246,435

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

	Three Months Ended December 31,				Nine Months Ended December 31,
		2014		2013		2014		2013
		(unaudited)				(unaudited)
Power semiconductors	$	52,245	$	52,688	$	165,993	$	164,074
Integrated circuits		23,484		31,155		70,804		65,755
Systems and RF power semiconductors		5,597		5,505		19,044		16,606
Total	$	81,326	$	89,348	$	255,841	$	246,435