Note 14 Segment Information (Tables)

6 Months Ended

Sep. 30, 2012

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,
			2012		2011	2012		2011
		(unaudited)				(unaudited)
United States		$	20,241	$	27,562	$	45,163	$	55,267
Europe and the Middle East
	France		1,125		1,915		2,698		3,946
	Germany		7,446		12,888		16,603		26,304
	United Kingdom		6,429		8,430		13,553		16,432
	Other		9,227		13,643		19,477		27,783
Asia Pacific
	China		10,586		16,971		23,970		35,536
	Japan		1,717		2,607		3,545		4,695
	Korea		2,082		3,004		4,325		6,949
	Malaysia		1,146		1,036		2,449		2,156
	Singapore		2,509		3,101		5,154		5,585
	Taiwan		1,253		1,765		2,477		3,997
	Other		1,319		1,717		2,674		3,086
Rest of the World
	India		1,470		2,425		3,272		5,254
	Other		1,911		1,940		3,958		3,792
Total		$	68,461	$	99,004	$	149,318	$	200,782

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

	Three Months Ended September 30,				Six Months Ended September 30,
		2012		2011		2012		2011
		(unaudited)				(unaudited)
Power semiconductors	$	48,203	$	74,731	$	107,785	$	151,195
Integrated circuits		15,100		16,949		30,699		35,060
Systems and RF power semiconductors		5,158		7,324		10,834		14,527
Total	$	68,461	$	99,004	$	149,318	$	200,782