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Investments (Tables) | 12 Months Ended
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Mar. 28, 2020
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments | Investments consisted of the following (in thousands):
| March 28, 2020 |  | March 30, 2019
Available-for-sale debt securities | $ | 14,774 |  |  | $ | 13,408 |
Marketable equity securities | 9,829 |  |  | 11,073 |
Non-marketable equity investments | 21,536 |  |  | 20,276 |
| $ | 46,139 |  |  | $ | 44,757 |
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 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 |
| March 30, 2019
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
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 |
U.S. Treasury and government debt securities | 300 |  |  | — |  |  | (3 | ) |  | 297 |
| $ | 13,443 |  |  | $ | 123 |  |  | $ | (158 | ) |  | $ | 13,408 |
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):
| March 28, 2020
| Less than 12 Months |  | 12 Months or Longer |  | Total
| 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 securities | 3,747 |  |  | (65 | ) |  | — |  |  | — |  |  | 3,747 |  |  | (65 | )
| $ | 4,481 |  |  | $ | (67 | ) |  | $ | 1,880 |  |  | $ | (27 | ) |  | $ | 6,361 |  |  | $ | (94 | )
| March 30, 2019
| Less than 12 Months |  | 12 Months or Longer |  | Total
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
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 | )
U.S. Treasury and government debt securities | — |  |  | — |  |  | 297 |  |  | (3 | ) |  | 297 |  |  | (3 | )
| $ | 1,662 |  |  | $ | (17 | ) |  | $ | 8,895 |  |  | $ | (141 | ) |  | $ | 10,557 |  |  | $ | (158 | )
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 penalties.
| March 28, 2020
| Amortized Cost |  | Fair Value
Due in less than one year | $ | 4,425 |  |  | $ | 4,418 |
Due after one year through five years | 2,379 |  |  | 2,338 |
Due after five years through ten years | 775 |  |  | 831 |
Due after ten years | 1,681 |  |  | 1,744 |
Mortgage-backed securities | 5,400 |  |  | 5,443 |
| $ | 14,660 |  |  | $ | 14,774 |

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