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Note 11 Stock-Based Compensation (Tables)
6 Months Ended
Mar. 30, 2013
Share-based Compensation [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
 
Three Months Ended
 
Six Months Ended
 
March 30, 2013
 
March 31, 2012
 
March 30,
2013
 
March 31,
2012
 
(In thousands)
Stock options
$
2,757

 
$
2,547

 
$
5,374

 
$
5,002

Restricted stock units
1,585

 
1,982

 
3,634

 
3,591

  Total
$
4,342

 
$
4,529

 
$
9,008

 
$
8,593

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
 
Three Months Ended
 
Six Months Ended
 
March 30,
2013
 
March 31,
2012
 
March 30,
2013
 
March 31,
2012
 
(In thousands)
Cost of sales
$
1,291

 
$
983

 
$
2,631

 
$
1,890

Selling, general and administrative
3,004

 
3,519

 
6,299

 
6,649

Research and development
47

 
27

 
78

 
54

  Total
$
4,342

 
$
4,529

 
$
9,008

 
$
8,593

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
Three Months Ended
 
Six Months Ended
 
March 30,
2013
 
March 31,
2012
 
March 30,
2013
 
March 31,
2012
Volatility
84.7
%
 
85.8
%
 
85.4
%
 
85.6
%
Risk-free interest rate
0.8
%
 
0.9
%
 
0.7
%
 
0.9
%
Dividend yield
%
 
%
 
%
 
%
Expected life of options (years)
5.0

 
5.0

 
5.0

 
5.0

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 
Number of
Shares
 
Weighted-
Average
Exercise Price
($)
 
Weighted-
Average
Remaining
Contractual
Term

 
Aggregate
Intrinsic
Value of
In-The-Money
Options
($)
 
(In thousands)
 
 
 
 
 
(In thousands)
Outstanding, September 29, 2012
11,275

 
13.15

 
6.54
 
18,548

Granted
900

 
8.54

 
 
 
 
Exercised/Cancelled/Forfeited/Expired
(366
)
 
8.97

 
 
 
 
Outstanding, December 29, 2012
11,809

 
12.93

 
6.57
 
23,083

Granted
50

 
11.78

 
 
 
 
Exercised/Cancelled/Forfeited/Expired
(445
)
 
8.88

 
 
 
 
Outstanding, March 30, 2013
11,414

 
13.08

 
6.30
 
31,538

Vested and expected to vest, March 30, 2013
10,982

 
13.21

 
6.20
 
30,514

Exercisable, March 30, 2013
8,050

 
14.46

 
5.35
 
23,044

Schedule of Restricted Stock Units Award Activity [Table Text Block]
 
Number of
Shares
 
Weighted-
Average Grant Date
Fair Value
($)
 
Weighted-
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
($)
 
(In thousands)
 
 
 
 
 
(In thousands)
Outstanding, September 29, 2012
2,230

 
9.51

 
1.08
 
21,272

Granted
760

 
8.53

 
 
 
 
Vested/Cancelled
(1,384
)
 
7.30

 
 
 
 
Outstanding, December 29, 2012
1,606

 
10.94

 
2.56
 
16,561

Granted
106

 
11.85

 
 
 
 
Vested/Cancelled
(152
)
 
11.36

 
 
 
 
Outstanding, March 30, 2013
1,560

 
10.96

 
2.35
 
18,487

Expected to vest, March 30, 2013
1,068

 
11.58

 
1.90
 
12,656