Note 15 Segment and Geographic Information (Tables)

6 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

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

		Three Months Ended				Six Months Ended
		September 30,				September 30,
			2013		2012	2013		2012
		(unaudited)				(unaudited)
United States		$	22,526	$	20,241	$	44,084	$	45,163
Europe and the Middle East
	France		1,329		1,125		2,632		2,698
	Germany		9,509		7,446		17,162		16,603
	Italy		1,021		905		1,994		1,931
	Sweden		1,288		1,265		2,668		2,425
	Switzerland		1,077		638		2,114		1,651
	United Kingdom		5,411		6,429		10,747		13,553
	Other		6,945		6,419		13,182		13,470
Asia Pacific
	China		20,267		10,586		34,941		23,970
	Japan		1,701		1,717		3,406		3,545
	Korea		5,440		2,082		7,304		4,325
	Malaysia		920		1,146		1,623		2,449
	Singapore		3,151		2,509		5,744		5,154
	Other		2,590		2,572		4,089		5,151
Rest of the World
	India		1,199		1,470		2,547		3,272
	Other		1,527		1,911		2,850		3,958
Total		$	85,901	$	68,461	$	157,087	$	149,318

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

	Three Months Ended September 30,				Six Months Ended September 30,
		2013		2012		2013		2012
		(unaudited)				(unaudited)
Power semiconductors	$	59,720	$	48,203	$	111,386	$	107,785
Integrated circuits		20,945		15,100		34,600		30,699
Systems and RF power semiconductors		5,236		5,158		11,101		10,834
Total	$	85,901	$	68,461	$	157,087	$	149,318