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Investments (Tables) | 12 Months Ended
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Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Summary of Available for Sale Securities | The following is a summary of our investments at December 31, 2020:
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
|  | (In thousands)
Equity securities |  |  |  |  |  |  |  |
Equities |  | $ | 172 |  |  | $ | 628 |  |  | $ | — |  |  | $ | 800 |
Mutual funds |  | 5,323 |  |  | 1,432 |  |  | — |  |  | 6,755 |
Available-for-sale securities |  |  |  |  |  |  |  |
U.S. Government and agency securities |  | 2,317 |  |  | 1 |  |  | (4) |  |  | 2,314 |
Corporate bonds |  | 2,879 |  |  | 259 |  |  | (6) |  |  | 3,132 |
Asset-backed securities and collateralized mortgage obligations |  | 115 |  |  | — |  |  | (53) |  |  | 62 |
Total |  | $ | 10,806 |  |  | $ | 2,320 |  |  | $ | (63) |  |  | $ | 13,063 |
The following is a summary of our investments at December 31, 2019:
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
|  | (In thousands)
Equity securities |  |  |  |  |  |  |  |
Equities |  | $ | 417 |  |  | $ | 1,755 |  |  | $ | — |  |  | $ | 2,172 |
Mutual funds |  | 4,988 |  |  | 697 |  |  | — |  |  | 5,685 |
Available-for-sale securities |  |  |  |  |  |  |  |
U.S. Government and agency securities |  | 2,039 |  |  | 5 |  |  | — |  |  | 2,044 |
Corporate bonds |  | 3,103 |  |  | 380 |  |  | — |  |  | 3,483 |
Asset-backed securities and collateralized mortgage obligations |  | 132 |  |  | — |  |  | (53) |  |  | 79 |
Total |  | $ | 10,679 |  |  | $ | 2,837 |  |  | $ | (53) |  |  | $ | 13,463 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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