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Cash, Cash Equivalents, Restricted Cash and Marketable Securities (Tables) | 6 Months Ended
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Jun. 30, 2023
Cash, Cash Equivalents, and Short-Term Investments [Abstract] |
Reconciliation of Cash, Cash Equivalents and Restricted Cash | The following table provides a reconciliation of cash and cash equivalents, and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the same amounts shown in the condensed consolidated statements of cash flows (in thousands):
|  | June 30, 2023 |  |  | December 31, 2022 |  |  | June 30, 2022 |  |  | December 31, 2021 |
Cash and cash equivalents |  | $ | 226,823 |  |  | $ | 202,004 |  |  | $ | 249,091 |  |  | $ | 436,189 |
Restricted cash |  |  | 210 |  |  |  | 207 |  |  |  | 202 |  |  |  | 219 |
Total cash and cash equivalents, and restricted cash shown in the condensed consolidated statements of cash flows |  | $ | 227,033 |  |  | $ | 202,211 |  |  | $ | 249,293 |  |  | $ | 436,408 |
Summary of Cash, Cash Equivalents and Marketable Securities | Cash and cash equivalents and marketable securities consist of the following (in thousands):
| Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Estimated Fair Value |
June 30, 2023 |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
Cash | $ | 74,527 |  |  | $ | - |  |  | $ | - |  |  | $ | 74,527 |
Money market funds |  | 152,296 |  |  |  | - |  |  |  | - |  |  |  | 152,296 |
Total cash and cash equivalents |  | 226,823 |  |  |  | - |  |  |  | - |  |  |  | 226,823 |
Marketable securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | 20,512 |  |  |  | - |  |  |  | (155 | ) |  |  | 20,357 |
U.S. government agency securities |  | 174,012 |  |  |  | - |  |  |  | (1,221 | ) |  |  | 172,791 |
Corporate debt securities |  | 262,114 |  |  |  | 6 |  |  |  | (566 | ) |  |  | 261,554 |
Total marketable securities available-for-sale |  | 456,638 |  |  |  | 6 |  |  |  | (1,942 | ) |  |  | 454,702 |
Total cash and cash equivalents, and marketable securities | $ | 683,461 |  |  | $ | 6 |  |  | $ | (1,942 | ) |  | $ | 681,525 |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
Cash | $ | 29,586 |  |  | $ | - |  |  | $ | - |  |  | $ | 29,586 |
Money market funds |  | 172,418 |  |  |  | - |  |  |  | - |  |  |  | 172,418 |
Total cash and cash equivalents |  | 202,004 |  |  |  | - |  |  |  | - |  |  |  | 202,004 |
Marketable securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | 42,502 |  |  |  | - |  |  |  | (194 | ) |  |  | 42,308 |
U.S. government agency securities |  | 88,429 |  |  |  | - |  |  |  | (397 | ) |  |  | 88,032 |
Corporate debt securities |  | 292,865 |  |  |  | 12 |  |  |  | (826 | ) |  |  | 292,051 |
Total marketable securities available-for-sale |  | 423,796 |  |  |  | 12 |  |  |  | (1,417 | ) |  |  | 422,391 |
Total cash and cash equivalents, and marketable securities | $ | 625,800 |  |  | $ | 12 |  |  | $ | (1,417 | ) |  | $ | 624,395 |
Maturities of Marketable Securities Available-for-Sale | The maturities of our marketable securities available-for-sale are as follows (in thousands):
|  | June 30, 2023 |
|  | Amortized Cost |  |  | Estimated Fair Value |
Mature in one year or less |  | $ | 399,173 |  |  | $ | 397,890 |
Mature after one year through two years |  |  | 57,465 |  |  |  | 56,812 |
|  | $ | 456,638 |  |  | $ | 454,702 |

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