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Investments (Tables) | 9 Months Ended
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Oct. 27, 2019
Investments [Abstract] |
Summary Of Investments | The following table summarizes the values of the Company’s available-for-sale securities:
| October 27, 2019 |  | January 27, 2019
(in thousands) | Market Value |  | Adjusted Cost |  | Gross Unrealized Gain |  | Market Value |  | Adjusted Cost |  | Gross Unrealized Gain
Convertible debt | $ | 7,847 |  |  | $ | 7,652 |  |  | $ | 195 |  |  | $ | 3,105 |  |  | $ | 3,105 |  |  | $ | — |
Total available-for-sale securities | $ | 7,847 |  |  | $ | 7,652 |  |  | $ | 195 |  |  | $ | 3,105 |  |  | $ | 3,105 |  |  | $ | — |
Schedule Of Investments, Classified By Maturity Period | The following table summarizes the maturities of the Company’s available-for-sale securities:
| October 27, 2019 |  | January 27, 2019
(in thousands) | Market Value |  | Adjusted Cost |  | Market Value |  | Adjusted Cost
Within 1 year | $ | 2,027 |  |  | $ | 1,993 |  |  | $ | 3,105 |  |  | $ | 3,105 |
After 1 year through 5 years | 5,820 |  |  | 5,659 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 7,847 |  |  | $ | 7,652 |  |  | $ | 3,105 |  |  | $ | 3,105 |

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