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Income Taxes (Tables)
12 Months Ended
Apr. 27, 2019
Income Tax Disclosure [Abstract]  
Schedule of Pretax Income Domestic and Foreign
The pretax income attributable to domestic and foreign operations was as follows:
 
Year Ended
 
April 27,
2019
 
April 28,
2018
 
April 29,
2017
Domestic
$
(8,402
)
 
$
9,235

 
$
16,010

Foreign
3,458

 
3,194

 
(422
)
Income before income taxes
$
(4,944
)
 
$
12,429

 
$
15,588

Schedule of Components of Income Tax Expense
Income tax (benefit) expense consisted of the following:
 
Year Ended
 
April 27,
2019
 
April 28,
2018
 
April 29,
2017
Current:
 
 
 
 
 
Federal
$
(2,142
)
 
$
1,646

 
$
5,268

State
384

 
868

 
1,158

Foreign
1,151

 
1,205

 
863

Deferred:
 
 
 
 
 
Federal
(2,725
)
 
3,693

 
(1,625
)
State
(390
)
 
27

 
(397
)
Foreign
(264
)
 
(572
)
 
(21
)
 
$
(3,986
)
 
$
6,867

 
$
5,246

Schedule of Effective Income Tax Rate Reconciliation
The 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,
2019
 
April 28,
2018
 
April 29,
2017
Computed income tax (benefit) expense at federal statutory rates
$
(1,038
)
 
$
3,779

 
$
5,456

Change in uncertain tax positions
(2,600
)
 
65

 
97

Research and development tax credit
(1,278
)
 
(1,598
)
 
(1,573
)
Other, net
587

 
559

 
378

Change in valuation allowances
(471
)
 
(486
)
 
388

GILTI
391

 

 

Stock compensation
308

 
336

 
497

Meals and entertainment
248

 
333

 
299

Dividends paid to retirement plan
(158
)
 
(238
)
 
(293
)
State taxes, net of federal benefit
25

 
592

 
539

Impact of Tax Act

 
3,819

 

Domestic production activities deduction

 
(294
)
 
(542
)
 
$
(3,986
)
 
$
6,867

 
$
5,246

Schedule of Deferred Tax Assets and Liabilities
The components of the net deferred tax asset were as follows:
 
April 27,
2019
 
April 28,
2018
Deferred tax assets:
 
 
 
Accrued warranty obligations
$
5,912

 
$
7,282

Vacation accrual
1,571

 
1,567

Deferred maintenance revenue
716

 
392

Allowance for excess and obsolete inventory
1,600

 
1,376

Equity compensation
486

 
553

Allowance for doubtful accounts
402

 
531

Inventory capitalization
567

 
481

Accrued compensation and benefits
549

 
651

Unrealized loss on foreign currency exchange

 
37

Net operating loss carry forwards
1,059

 
1,286

Research and development tax credit carry forwards
1,299

 
334

Other
1,647

 
1,042

 
15,808

 
15,532

Valuation allowance
(893
)
 
(1,506
)
 
14,915

 
14,026

 
 
 
 
Deferred tax liabilities:
 

 
 

Property and equipment
(3,100
)
 
(4,881
)
Prepaid expenses
(476
)
 
(486
)
Intangible assets
(623
)
 
(1,302
)
Unrealized gain on foreign currency exchange
(6
)
 

Other
(75
)
 
(41
)
 
(4,280
)
 
(6,710
)
 
$
10,635

 
$
7,316

Schedule of Deferred Tax Assets and Liabilities Current and Non Current
The classification of net deferred tax assets in the accompanying consolidated balance sheets is:
 
April 27,
2019
 
April 28,
2018
Non-current assets
$
11,168

 
$
7,930

Non-current liabilities
(533
)
 
(614
)
 
$
10,635

 
$
7,316

Reconciliation of Unrecognized Tax Benefits
The summary of changes in the amounts related to unrecognized uncertain tax benefits are:
 
April 27, 2019
 
April 28, 2018
Balance at beginning of year
$
3,178

 
$
3,113

Gross increases related to prior period tax positions
13

 
82

Gross decreases related to prior period tax positions
(18
)
 
(30
)
Gross increases related to current period tax positions
146

 
152

Lapse of statute of limitations
(2,741
)
 
(139
)
Balance at end of year
$
578

 
$
3,178