Stock Incentive Plans, Employee Retirement Plan and Deferred Compensation Plans (Details 1) (USD $)	Sep. 30, 2012	Oct. 02, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Of shares	54,757,200	57,983,500
Weighted Average Exercise Price	$ 0.24	$ 0.26
Options Exercisable
Number Of shares	34,509,400
Weighted Average Exercise Price	$ 0.31
ExercisePriceRangeOne [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Minimum	$ 0.09
Exercise Price Maximum	$ 0.16
Number Of shares	54,311,900
Weighted Average Exercise Price	$ 0.12
Weighted Average Remaining Contractual Term	8 years 6 months
Average Intrensic Value	$ 411,500
Options Exercisable
Number Of shares	34,064,100
Weighted Average Exercise Price	$ 0.12
Average Intrensic Value	296,600
ExercisePriceRangeTwo [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Minimum	$ 0.35
Exercise Price Maximum	$ 1.7
Number Of shares	127,000
Weighted Average Exercise Price	$ 0.42
Weighted Average Remaining Contractual Term	1 year 8 months 12 days
Average Intrensic Value
Options Exercisable
Number Of shares	127,000
Weighted Average Exercise Price	$ 0.42
Average Intrensic Value
ExercisePriceRangeThree [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Minimum	$ 8.6
Exercise Price Maximum	$ 14.1
Number Of shares	158,300
Weighted Average Exercise Price	$ 13.04
Weighted Average Remaining Contractual Term	4 years 3 months 18 days
Average Intrensic Value
Options Exercisable
Number Of shares	158,300
Weighted Average Exercise Price	$ 13.04
Average Intrensic Value
ExercisePriceRangeFour [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Minimum	$ 15.6
Exercise Price Maximum	$ 22.5
Number Of shares	52,700
Weighted Average Exercise Price	$ 21.47
Weighted Average Remaining Contractual Term	2 years 3 months 18 days
Average Intrensic Value
Options Exercisable
Number Of shares	52,700
Weighted Average Exercise Price	$ 21.47
Average Intrensic Value
ExercisePriceRangeFive [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Minimum	$ 25
Exercise Price Maximum	$ 36.2
Number Of shares	107,300
Weighted Average Exercise Price	$ 31.58
Weighted Average Remaining Contractual Term	1 year 10 months 24 days
Average Intrensic Value
Options Exercisable
Number Of shares	107,300
Weighted Average Exercise Price	$ 31.58
Average Intrensic Value