Note 14 Segment and Geographic Information (Policy)	12 Months Ended
Mar. 31, 2013
Segment Reporting [Abstract]
Segment Reporting, Policy [Policy Text Block]	We have a single operating segment. This operating segment is comprised of semiconductor products used primarily in power-related applications. While we have separate legal subsidiaries with discrete financial information, we have one chief operating decision maker with highly integrated businesses.

Disclosure of accounting policy for segment reporting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Name:	us-gaap_SegmentReportingPolicyPolicyTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration