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Income Taxes (Tables)
12 Months Ended
Apr. 27, 2013
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense
Income tax expense (benefit) consisted of the following:
 
Year Ended
 
April 27,
2013
 
April 28,
2012
 
April 30,
2011
Current:
 
 
 
 
 
Federal
$
9,517

 
$
2,266

 
$
4,879

State
2,219

 
577

 
1,227

Foreign
754

 
313

 
939

Deferred taxes
(4,340
)
 
(68
)
 
852

 
$
8,150

 
$
3,088

 
$
7,897

Schedule of Effective Income Tax Rate Reconciliation
A reconciliation of the provision for income taxes and the amount computed by applying the federal statutory rate to income before income taxes is as follows:
 
 
Year Ended
 
 
April 27,
2013
 
April 28,
2012
 
April 30,
2011
Computed income tax expense at federal statutory rate
 
$
10,825

 
$
4,052

 
$
7,732

State taxes, net of federal benefit
 
684

 
497

 
1,107

Research and development tax credit
 
(1,804
)
 
(1,004
)
 
(981
)
Meals and entertainment
 
308

 
375

 
299

Stock compensation
 
466

 
842

 
959

Dividends paid to retirement plan
 
(616
)
 
(522
)
 

Domestic production activities deduction
 
(976
)
 
(270
)
 
(607
)
Change in foreign deferred rates
 

 
(249
)
 

Reversal of valuation allowance
 

 
(364
)
 

Other, net
 
(737
)
 
(269
)
 
(612
)
 
 
$
8,150

 
$
3,088

 
$
7,897

Schedule of Pretax Income Domestic and Foreign
The pretax income attributable to domestic and foreign operations was as follows:
 
Year Ended
 
April 27,
2013
 
April 28,
2012
 
April 30,
2011
Domestic
$
27,667

 
$
10,052

 
$
17,892

Foreign
3,262

 
1,525

 
4,249

Income before income taxes
$
30,929

 
$
11,577

 
$
22,141

Schedule of Deferred Tax Assets and Liabilities
The components of the net deferred tax asset were as follows:
 
April 27,
2013
 
April 28,
2012
Deferred taxes assets:
 
 
 
Warranty reserves
$
9,847

 
$
8,425

Vacation accrual
1,788

 
1,821

Net losses on equity investments
3,066

 
2,971

Deferred maintenance revenue
2,439

 
1,738

Reserves for excess and obsolete inventory
1,246

 
1,021

Equity compensation
1,049

 
653

Allowance for doubtful accounts
599

 
473

Inventory capitalization
600

 
907

Accrued compensation and benefits
1,077

 
742

Intangible assets
37

 
81

Net operating loss carry forwards

 
15

Other
440

 
334

 
22,188

 
19,181

Deferred tax liabilities:
 

 
 

Property and equipment
(7,542
)
 
(8,817
)
Prepaid expenses
(662
)
 
(669
)
Other
(168
)
 
(219
)
 
(8,372
)
 
(9,705
)
 
$
13,816

 
$
9,476

Schedule of Deferred Tax Assets and Liabilities Current and Non Current
The following presents the classification of the net deferred tax asset on the accompanying consolidated balance sheets:
 
April 27,
2013
 
April 28,
2012
Current assets
$
12,755

 
$
10,941

Current liabilities

 
(42
)
Non-current assets
1,061

 
30

Non-current liabilities

 
(1,453
)
 
$
13,816

 
$
9,476

Reconciliation of Unrecognized Tax Benefits
The following table provides a reconciliation of changes in unrecognized tax benefits for fiscal 2013, 2012 and 2011:
 
Amount
Balance as of May 1, 2010:
$
538

Gross increases related to prior period tax positions
132

Gross decreases related to prior period tax positions
(104
)
Gross increases related to current period tax positions
81

Lapse of statute of limitations
(120
)
Balance as of April 30, 2011:
$
527

Gross increases related to prior period tax positions
14

Gross decreases related to prior period tax positions
(178
)
Gross increases related to current period tax positions
86

Lapse of statute of limitations

Balance as of April 28, 2012:
$
449

Gross increases related to prior period tax positions

Gross decreases related to prior period tax positions
(11
)
Gross increases related to current period tax positions
129

Lapse of statute of limitations
(188
)
Balance as of April 27, 2013:
$
379