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Available-for-Sale-Securities (Tables) | 6 Months Ended
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Jun. 30, 2022
Debt Securities, Available-for-sale [Abstract] |
Schedule of Available-for-sale Securities Reconciliation | The following table is a summary of available-for-sale securities recorded in cash and cash equivalents or marketable securities in our Consolidated Balance Sheets (in thousands):
| June 30, 2022 |  | December 31, 2021
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Corporate debt securities | $ | 26,966 |  |  | $ | — |  |  | $ | (66) |  |  | $ | 26,900 |  |  | $ | 53,135 |  |  | $ | — |  |  | $ | (65) |  |  | $ | 53,070 |
Commercial paper | 2,978 |  |  | — |  |  | — |  |  | 2,978 |  |  | — |  |  | — |  |  | — |  |  | — |
Money market funds | 22,727 |  |  | — |  |  | — |  |  | 22,727 |  |  | 18,124 |  |  | — |  |  | — |  |  | 18,124 |
Municipal debt securities | 17,086 |  |  | — |  |  | (3) |  |  | 17,083 |  |  | 20,263 |  |  | — |  |  | (5) |  |  | 20,258 |
Total | $ | 69,757 |  |  | $ | — |  |  | $ | (69) |  |  | $ | 69,688 |  |  | $ | 91,522 |  |  | $ | — |  |  | $ | (70) |  |  | $ | 91,452 |
Schedule of Marketable Securities | Estimated fair values of available-for-sale securities are generally based on prices obtained from commercial pricing services. The following table summarizes the classification of the available-for-sale securities in our Consolidated Balance Sheets (in thousands):
| June 30, 2022 |  | December 31, 2021
Cash equivalents | $ | 30,045 |  |  | $ | 21,129 |
Marketable securities | 39,643 |  |  | 70,323 |
Total | $ | 69,688 |  |  | $ | 91,452 |
Investments Classified by Contractual Maturity Date | The following table summarizes our portfolio of available-for-sale securities by contractual maturity (in thousands):
| June 30, 2022
| Amortized Cost |  | Estimated Fair Value
Less than one year | $ | 69,757 |  |  | $ | 69,688 |
Greater than one year | — |  |  | — |
Total | $ | 69,757 |  |  | $ | 69,688 |

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