Note 14 Segment Information (Narratives) (Details)	3 Months Ended		6 Months Ended
	Sep. 30, 2012 N	Sep. 30, 2011 N	Sep. 30, 2012 N	Sep. 30, 2011 N
Segment Reporting [Abstract]
Top Customer Percentage More Than 10% of Total Revenue	14.10%	11.80%	13.20%	12.30%
Second Customer Percentage More Than 10% of Total Revenue	10.00%	11.20%	10.90%	11.10%
Number of Major Customers	2	2	2	2