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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, All Other Investments [Abstract] |
Cash and Available for Sale Securities Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses, and Fair Value by Significant Investment Category | The following tables present the Company’s cash and financial assets that are measured at fair value on a recurring basis for each of the hierarchy levels (in thousands):
| December 31, 2021
| Cost |  | Unrealized Gains |  | Accrued Interest |  | Estimated Fair Value |  | Cash & Cash Equivalents |  | Investment Securities
Cash and cash equivalents | $ | 94,824 |  |  | $ | — |  |  | $ | — |  |  | $ | 94,824 |  |  | $ | 94,824 |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |
Money market accounts | 9,359 |  |  | — |  |  | — |  |  | 9,359 |  |  | 9,359 |  |  | — |
Government & agency securities | 1,401 |  |  | 12 |  |  | — |  |  | 1,413 |  |  | — |  |  | 1,413 |
| 10,760 |  |  | 12 |  |  | — |  |  | 10,772 |  |  | 9,359 |  |  | 1,413 |
Level 2: |  |  |  |  |  |  |  |  |  |  |
Municipal bonds | 3,880 |  |  | 9 |  |  | 59 |  |  | 3,948 |  |  | — |  |  | 3,948 |
Total | $ | 109,464 |  |  | $ | 21 |  |  | $ | 59 |  |  | $ | 109,544 |  |  | $ | 104,183 |  |  | $ | 5,361 |
| December 31, 2020
| Cost |  | Unrealized Gains |  | Accrued Interest |  | Estimated Fair Value |  | Cash & Cash Equivalents |  | Investment Securities
Cash and cash equivalents | $ | 159,754 |  |  | $ | — |  |  | $ | — |  |  | $ | 159,754 |  |  | $ | 159,754 |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |
Money market accounts | 3,969 |  |  | — |  |  | — |  |  | 3,969 |  |  | 3,969 |  |  | — |
Government & agency securities | 2,829 |  |  | 45 |  |  | — |  |  | 2,874 |  |  | — |  |  | 2,874 |
| 6,798 |  |  | 45 |  |  | — |  |  | 6,843 |  |  | 3,969 |  |  | 2,874 |
Level 2: |  |  |  |  |  |  |  |  |  |  |
Municipal bonds | 7,689 |  |  | 42 |  |  | 147 |  |  | 7,878 |  |  | — |  |  | 7,878 |
Total | $ | 174,241 |  |  | $ | 87 |  |  | $ | 147 |  |  | $ | 174,475 |  |  | $ | 163,723 |  |  | $ | 10,752 |

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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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