Note 11 Employee Equity Incentive Plans (Fair Value and Assumptions) (Details) (USD $)	3 Months Ended			9 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award Fair Value Assumptions and Methodology [Line Items]
Weighted Average Estimated Fair Value of Grant Per Share	$ 0	[1]	$ 6.36	$ 5.21	$ 6.43
Risk-free Interest Rate	0.00%	[1]	1.10%	1.00%	1.40%
Expected Term in Years	$ 0	[1]	$ 6.0	$ 6.3	$ 5.8
Volatility	0.00%	[1]	56.40%	55.40%	55.70%
Dividend Yield	0.00%	[1]	0.00%	0.00%	0.00%
Employee Stock Purchase Plan 1999 [Member]
Share-based Compensation Arrangement by Share-based Payment Award Fair Value Assumptions and Methodology [Line Items]
Weighted Average Estimated Fair Value of Grant Per Share	$ 2.81		$ 3.88	$ 3.22	$ 3.14
Risk-free Interest Rate	0.10%		0.10%	0.20%	0.20%
Expected Term in Years	$ 0.5		$ 0.5	$ 0.5	$ 0.5
Volatility	46.00%		59.40%	46.40%	51.60%
Dividend Yield	0.00%		0.00%	0.00%	0.00%

[1] No stock options were granted during the quarter ended December 31, 2012.