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Investments (Tables)
 12 Months Ended
Apr. 03, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investments
Investments consisted of the following (in thousands):
April 3,
2021		March 28,
2020
Available-for-sale debt securities
$14,946 $14,774 
Marketable equity securities
17,600 9,829 
Non-marketable equity investments
21,960 21,536 
54,506 46,139 
Less current portion(19,496)(14,582)
$35,010 $31,557 
Available-for-sale debt securities by investment category The following tables summarize our available-for-sale debt securities, gross unrealized gains and losses and fair value, aggregated by investment category (in thousands):
 April 3, 2021
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Residential mortgage-backed securities
$2,787 $30 $(13)$2,804 
State and political subdivision debt securities
7,239 125 (19)7,345 
Corporate debt securities
4,797 11 (11)4,797 
$14,823 $166 $(43)$14,946 

 March 28, 2020
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Residential mortgage-backed securities
$5,400 $69 $(26)$5,443 
State and political subdivision debt securities
4,239 134 (3)4,370 
Corporate debt securities
5,021 5 (65)4,961 
$14,660 $208 $(94)$14,774 
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 had been in a continuous unrealized loss position (in thousands):
April 3, 2021
 Less than 12 Months12 Months or LongerTotal
Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
Residential mortgage-backed securities
$927 $(6)$450 $(7)$1,377 $(13)
State and political subdivision debt securities
3,013 (19)— — 3,013 (19)
Corporate debt securities2,153 (10)249 (1)2,402 (11)
$6,093 $(35)$699 $(8)$6,792 $(43)

March 28, 2020
 Less than 12 Months12 Months or LongerTotal
Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
Residential mortgage-backed securities
$133 $— $1,779 $(26)$1,912 $(26)
State and political subdivision debt securities
601 (2)101 (1)702 (3)
Corporate debt securities3,747 (65)— — 3,747 (65)
$4,481 $(67)$1,880 $(27)$6,361 $(94)
Contractual Maturity of Investment Securities
The amortized cost and fair value of our 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 penalties. 
 April 3, 2021
Amortized
Cost		Fair
Value
Due in less than one year
$1,218 $1,220 
Due after one year through five years
8,487 8,484 
Due after five years through ten years
1,022 1,087 
Due after ten years
1,309 1,351 
Mortgage-backed securities
2,787 2,804 
$14,823 $14,946 
Gain (Loss) on Securities Net investment gains and losses on marketable equity securities for fiscal years 2021, 2020 and 2019 were as follows (in thousands):
Year Ended
April 3,
2021		March 28, 2020March 30, 2019
Marketable equity securities:
Net gain (loss) recognized during the period$8,515 $(2,264)$(355)
Less: Net (gains) losses recognized on securities sold during the period(2,191)232 64 
Unrealized gains (losses) recognized during the period on securities still held$6,324 $(2,032)$(291)