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v3.21.1

Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Schedule for available-for-sale securities | The following is a summary of available-for-sale securities as of March 31, 2021 (in thousands):
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized (Losses) |  | Estimated Fair Value
Tax-exempt municipal securities | $ | 18,917 |  |  | $ | 324 |  |  | $ | — |  |  | $ | 19,241 |
Corporate debt securities | 16,139 |  |  | 355 |  |  | — |  |  | 16,494 |
Total | $ | 35,056 |  |  | $ | 679 |  |  | $ | — |  |  | $ | 35,735 |
The following is a summary of available-for-sale securities as of December 31, 2020 (in thousands):
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized (Losses) |  | Estimated Fair Value
Tax-exempt municipal securities | $ | 19,924 |  |  | $ | 365 |  |  | $ | — |  |  | $ | 20,289 |
Corporate debt securities | 17,086 |  |  | 452 |  |  | — |  |  | 17,538 |
Total | $ | 37,010 |  |  | $ | 817 |  |  | $ | — |  |  | $ | 37,827 |
Schedule of maturities of marketable securities | The following table summarizes the maturities of the Company’s marketable securities as of December 31, 2020 and March 31, 2021 (in thousands):
| December 31, 2020 |  | March 31, 2021
Due within one year | $ | 7,557 |  |  | $ | 6,455 |
Due after one year through five years | 30,270 |  |  | 29,280 |
Total | $ | 37,827 |  |  | $ | 35,735 |
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 months ended March 31, 2020 and 2021 (in thousands):
| For the three months ended March 31, |  |
| 2020 |  | 2021 |  |  |  |
Maturities of marketable securities | $ | 9,905 |  |  | $ | 1,930 |  |  |  |  |
Sales of marketable securities | — |  |  | — |  |  |  |  |
Total | $ | 9,905 |  |  | $ | 1,930 |  |  |  |  |

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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 http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563 + Details
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