Equity Plans (Tables)
 6 Months Ended
Feb. 27, 2014
Table Text Block [Abstract]  
Assumptions used in Black-Scholes option valuation model
 Assumptions used in the Black-Scholes model are presented below:

 
 
Quarter Ended
 
Six Months Ended
 
 
February 27,
2014
 
February 28,
2013
 
February 27,
2014
 
February 28,
2013
Average expected life in years
 
4.8

 
5.1

 
4.8

 
5.1

Weighted-average expected volatility
 
46
%
 
59
%
 
47
%
 
60
%
Weighted-average risk-free interest rate
 
1.6
%
 
0.7
%
 
1.6
%
 
0.7
%
Schedule of restricted stock awards activity
Restricted Stock Awards granted for the second quarters and first six months of 2014 and 2013 were as follows:

 
 
Quarter Ended
 
Six Months Ended
 
 
February 27,
2014
 
February 28,
2013
 
February 27,
2014
 
February 28,
2013
Service-based awards in shares
 
4

 
3

 
5

 
5

Performance-based awards in shares
 
—

 
—

 
1

 
1

Weighted-average grant-date fair values per share
 
$
23.24

 
$
6.69

 
$
21.22

 
$
6.20
Stock-based compensation expense
Stock-based Compensation Expense

 
 
Quarter Ended
 
Six Months Ended
 
 
February 27,
2014
 
February 28,
2013
 
February 27,
2014
 
February 28,
2013
Stock-based compensation expense by caption:
 
 
 
 
 
 
 
 
Cost of goods sold
 
$
8

 
$
7

 
$
15

 
$
13

Selling, general and administrative
 
13

 
9

 
24

 
18

Research and development
 
6

 
5

 
10

 
9

 
 
$
27

 
$
21

 
$
49

 
$
40

 
 
 
 
 
 
 
 
 
Stock-based compensation expense by type of award:
 
 
 
 
 
 
 
 
Stock options
 
$
14

 
$
14

 
$
28

 
$
27

Restricted stock awards
 
13

 
7

 
21

 
13

 
 
$
27

 
$
21

 
$
49

 
$
40