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Shareholders' Equity and Share-Based Compensation (Tables)
 12 Months Ended
Apr. 26, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Restricted Stock and Restricted Stock Units Activity
A summary of nonvested restricted stock and restricted stock units for the years ended April 26, 2014, April 27, 2013 and April 28, 2012 is as follows:
 
Year Ended
 
April 26, 2014
 
April 27, 2013
 
April 28, 2012
 
Number of
Nonvested
Shares
 
Weighted Average Grant Date Fair Value Per Share
 
Number of
Nonvested
Shares
 
Weighted Average Grant Date Fair Value Per Share
 
Number of
Nonvested
Shares
 
Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of year
279

 
$
9.74

 
242

 
$
9.81

 
181

 
$
11.07

Granted
147

 
10.03

 
119

 
8.50

 
118

 
8.24

Vested
(85
)
 
9.47

 
(69
)
 
12.05

 
(49
)
 
10.51

Forfeited
(23
)
 
9.37

 
(13
)
 
9.63

 
(8
)
 
10.85

Outstanding at end of year
318

 
9.59

 
279

 
9.74

 
242

 
9.81
Schedule of Stock Option Award Activity
A summary of stock option activity under all stock option plans during the fiscal year ended April 26, 2014 is as follows:
 
Stock Options
 
Weighted Average Exercise Price Per Share
 
Weighted Average Remaining Contractual Life (Years)
 
Aggregate Intrinsic Value
Outstanding at April 27, 2013
3,421

 
$
13.59

 
5.09

 
$
1,176

Granted
226

 
11.04

 
—

 
—

Canceled or forfeited
(205
)
 
17.56

 
—

 
—

Exercised
(507
)
 
9.77

 
—

 
1,534

Outstanding at April 26, 2014
2,935

 
$
13.77

 
5.00

 
$
6,333

 
 
 
 
 
 
 
 
Shares vested and expected to vest
2,903

 
$
13.81

 
4.96

 
$
6,241

Exercisable at April 26, 2014
2,077

 
$
15.23

 
3.79

 
$
3,808
Schedule of Weighted-Average Assumptions
The following table provides the weighted-average fair value of options granted and the related assumptions used in the Black-Scholes model:
 
Year Ended
 
April 26,
2014
 
April 27,
2013
 
April 28,
2012
Fair value of options granted
$
4.96

 
$
3.43

 
$
3.46

Risk-free interest rate
2.03 - 2.34%

 
0.71 - 1.13%

 
1.10 - 1.50%

Expected dividend rate
2.32
%
 
2.43%

 
0.71 - 2.15%

Expected volatility
54.09 - 54.37%

 
45.60 - 46.15%

 
44.59 - 46.85%

Expected life of option
5.9 - 6.9 years

 
5.9 - 6.8 years

 
5.9 - 6.8 years
Schedule of Share-Based Compensation Expense by Award Type
The following table presents a summary of the share-based compensation expense by equity type as follows:
 
Year Ended
 
April 26,
2014
 
April 27,
2013
 
April 28,
2012
Stock options
$
1,451

 
$
1,812

 
$
2,565

Restricted stock and stock units
1,000

 
765

 
256

Employee stock purchase plan
446

 
460

 
441

 
$
2,897

 
$
3,037

 
$
3,262
Schedule of Share-Based Compensation Expense
A summary of the share-based compensation expenses for stock options, restricted stock, restricted stock units and shares issued under the ESPP for the fiscal years ended April 26, 2014, April 27, 2013 and April 28, 2012 is as follows:
 
Year Ended
 
April 26,
2014
 
April 27,
2013
 
April 28,
2012
Cost of goods sold
$
657

 
$
633

 
$
610

Selling
810

 
856

 
982

General and administrative
859

 
980

 
1,059

Product design and development
571

 
568

 
611

 
$
2,897

 
$
3,037

 
$
3,262