Note 12 Fair Value Assumptions and Methodology (Details)	3 Months Ended	6 Months Ended
Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	85.80%	82.60%	85.60%	82.30%
Risk free interest rate	0.90%	2.10%	0.90%	1.70%
Dividend yield	0.00%	0.00%	0.00%	0.00%
Expected life of options (years)	5.0	5.0	5.0	5.0

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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