Note 14 Segment Information (Tables)

9 Months Ended

Dec. 31, 2012

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,
			2012		2011	2012		2011
		(unaudited)				(unaudited)
United States		$	19,431	$	21,751	$	64,594	$	77,018
Europe and the Middle East
	France		1,138		1,936		3,836		5,882
	Germany		7,433		9,665		24,036		35,969
	United Kingdom		5,465		6,809		19,018		23,241
	Other		9,019		12,582		28,496		40,365
Asia Pacific
	China		9,699		13,328		33,669		48,864
	Japan		1,348		1,817		4,893		6,512
	Korea		1,746		2,523		6,071		9,472
	Malaysia		1,108		1,262		3,557		3,418
	Singapore		2,287		2,324		7,441		7,909
	Taiwan		745		1,550		3,222		5,547
	Other		1,490		1,648		4,164		4,734
Rest of the World
	India		1,251		1,204		4,523		6,458
	Other		1,652		1,642		5,610		5,434
Total		$	63,812	$	80,041	$	213,130	$	280,823

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

	Three Months Ended December 31,				Nine Months Ended December 31,
		2012		2011		2012		2011
		(unaudited)				(unaudited)
Power semiconductors	$	45,011	$	60,101	$	152,796	$	211,296
Integrated circuits		13,401		13,653		44,100		48,713
Systems and RF power semiconductors		5,400		6,287		16,234		20,814
Total	$	63,812	$	80,041	$	213,130	$	280,823