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Investments (Tables)
 12 Months Ended
Mar. 30, 2019
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investments
Investments consist of the following (in thousands):
 
March 30,
2019
 
March 31,
2018
Available-for-sale debt securities
$
13,408

 
$
16,181

Marketable equity securities
11,073

 
10,405

Non-marketable equity investments
20,276

 
18,853

 
$
44,757

 
$
45,439
Available-for-Sale Securities by Investment Category
The following tables summarize the Company's available-for-sale debt securities, gross unrealized gains and losses and fair value, aggregated by investment category (in thousands):
 
March 30, 2019
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
U.S. Treasury and government debt securities
$
300

 
$
—

 
$
(3
)
 
$
297

Residential mortgage-backed securities
6,625

 
3

 
(119
)
 
6,509

State and political subdivision debt securities
4,883

 
117

 
(17
)
 
4,983

Corporate debt securities
1,635

 
3

 
(19
)
 
1,619

 
$
13,443

 
$
123

 
$
(158
)
 
$
13,408


 
March 31, 2018
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
U.S. Treasury and government debt securities
$
300

 
$
—

 
$
(7
)
 
$
293

Residential mortgage-backed securities
7,654

 
—

 
(155
)
 
7,499

State and political subdivision debt securities
6,377

 
109

 
(149
)
 
6,337

Corporate debt securities
2,081

 
1

 
(30
)
 
2,052

 
$
16,412

 
$
110

 
$
(341
)
 
$
16,181
Investment Securities in a Continuous Unrealized Loss Position
The following tables show gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):
 
March 30, 2019
 
Less than 12 Months
 
12 Months or Longer
 
Total
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
U.S. Treasury and government debt securities
$
—

 
$
—

 
$
297

 
$
(3
)
 
$
297

 
$
(3
)
Residential mortgage-backed securities
1,066

 
(9
)
 
5,206

 
(110
)
 
6,272

 
(119
)
State and political subdivision debt securities
353

 
—

 
2,319

 
(17
)
 
2,672

 
(17
)
Corporate debt securities
243

 
(8
)
 
1,073

 
(11
)
 
1,316

 
(19
)
 
$
1,662

 
$
(17
)
 
$
8,895

 
$
(141
)
 
$
10,557

 
$
(158
)

 
March 31, 2018
 
Less than 12 Months
 
12 Months or Longer
 
Total
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
U.S. Treasury and government debt securities
$
293

 
$
(7
)
 
$
—

 
$
—

 
$
293

 
$
(7
)
Residential mortgage-backed securities
3,185

 
(52
)
 
3,909

 
(103
)
 
7,094

 
(155
)
State and political subdivision debt securities
2,224

 
(40
)
 
2,180

 
(109
)
 
4,404

 
(149
)
Corporate debt securities
1,384

 
(12
)
 
367

 
(18
)
 
1,751

 
(30
)
 
$
7,086

 
$
(111
)
 
$
6,456

 
$
(230
)
 
$
13,542

 
$
(341
)
Contractual Maturity of Investment Securities
The amortized cost and fair value of the Company's investments in available-for-sale debt securities, by contractual maturity, are shown in the table below (in thousands). Expected maturities differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. 
 
March 30, 2019
 
Amortized
Cost
 
Fair
Value
Due in less than one year
$
1,265

 
$
1,258

Due after one year through five years
2,954

 
2,927

Due after five years through ten years
—

 
—

Due after ten years
2,599

 
2,714

Mortgage-backed securities
6,625

 
6,509

 
$
13,443

 
$
13,408