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Venture Capital Investments and Marketable Securities (Tables) | 6 Months Ended
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Jun. 25, 2016
Marketable Securities and Equity-Method Affiliates [Abstract] |
Schedule of Available-for-sale Securities Reconciliation | The following is a summary of the Company's marketable securities, all of which are classified as available-for-sale:
| June 25, 2016
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (in thousands)
Mutual fund | $ | 4,650 |  |  | $ | — |  |  | $ | (23 | ) |  | $ | 4,627 |
Total | $ | 4,650 |  |  | $ | — |  |  | $ | (23 | ) |  | $ | 4,627 |
| December 26, 2015
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (in thousands)
Mutual fund | $ | 4,650 |  |  | $ | — |  |  | $ | (141 | ) |  | $ | 4,509 |
Total | $ | 4,650 |  |  | $ | — |  |  | $ | (141 | ) |  | $ | 4,509 |

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- Definition Marketable Securities and Equity-Method Affiliates [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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