Note 15 Segment and Geographic Information (Tables)

9 Months Ended

Dec. 31, 2013

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,
			2013		2012	2013		2012
		(unaudited)				(unaudited)
United States		$	21,959	$	19,431	$	66,043	$	64,594
Europe and the Middle East
	France		1,097		1,138		3,729		3,836
	Germany		7,376		7,433		24,538		24,036
	Italy		1,280		798		3,274		2,729
	Sweden		1,142		1,115		3,810		3,540
	Switzerland		919		952		3,033		2,603
	United Kingdom		4,177		5,465		14,924		19,018
	Other		6,943		6,154		20,125		19,624
Asia Pacific
	China		27,631		9,699		62,572		33,669
	Japan		1,238		1,348		4,644		4,893
	Korea		5,503		1,746		12,807		6,071
	Malaysia		881		1,108		2,504		3,557
	Singapore		3,048		2,287		8,792		7,441
	Other		2,631		2,235		6,720		7,386
Rest of the World
	India		1,147		1,251		3,694		4,523
	Other		2,376		1,652		5,226		5,610
Total		$	89,348	$	63,812	$	246,435	$	213,130

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

	Three Months Ended December 31,				Nine Months Ended December 31,
		2013		2012		2013		2012
		(unaudited)				(unaudited)
Power semiconductors	$	52,688	$	45,011	$	164,074	$	152,796
Integrated circuits		31,155		13,401		65,755		44,100
Systems and RF power semiconductors		5,505		5,400		16,606		16,234
Total	$	89,348	$	63,812	$	246,435	$	213,130