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Marketable Securities (Tables) | 6 Months Ended
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Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule for Available-for-Sale Securities | The following is a summary of available-for-sale securities as of June 30, 2022 (in thousands):
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized (Losses) |  | Estimated Fair Value
Tax-exempt municipal securities | $ | 18,598 |  |  | $ | 4 |  |  | $ | (365) |  |  | $ | 18,237 |
Corporate debt securities | 8,718 |  |  | — |  |  | (162) |  |  | 8,556 |
Total | $ | 27,316 |  |  | $ | 4 |  |  | $ | (527) |  |  | $ | 26,793 |
The following is a summary of available-for-sale securities as of December 31, 2021 (in thousands):
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized (Losses) |  | Estimated Fair Value
Tax-exempt municipal securities | $ | 18,546 |  |  | $ | 271 |  |  | $ | — |  |  | $ | 18,817 |
Corporate debt securities | 10,898 |  |  | 163 |  |  | — |  |  | 11,061 |
Total | $ | 29,444 |  |  | $ | 434 |  |  | $ | — |  |  | $ | 29,878 |
Schedule of Maturities of Marketable Securities | The following table summarizes the maturities of the Company’s marketable securities as of December 31, 2021 and June 30, 2022 (in thousands):
| December 31, 2021 |  | June 30, 2022
Due within one year | $ | 6,501 |  |  | $ | 8,854 |
Due after one year through five years | 23,377 |  |  | 17,939 |
Total | $ | 29,878 |  |  | $ | 26,793 |
Schedule of Proceeds from the Maturities of Available-for-Sale Securities | The following table summarizes the proceeds from the maturities and sales of available-for-sale securities for the three and six months ended June 30, 2021 and 2022 (in thousands):
| For the three months ended June 30, |  | For the six months ended June 30, |  |
| 2021 |  | 2022 |  | 2021 |  | 2022 |  |  |  |
Maturities of marketable securities | $ | 3,665 |  |  | $ | 1,000 |  |  | $ | 5,595 |  |  | $ | 2,100 |  |  |  |  |
Sales of marketable securities | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Total | $ | 3,665 |  |  | $ | 1,000 |  |  | $ | 5,595 |  |  | $ | 2,100 |  |  |  |  |

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
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