| Schedule of Fair Value by Significant Investment Category |
The following table summarizes the Company’s cash and available-for-sale securities’ amortized cost, unrealized gains (losses), and fair value by significant investment category reported as cash and cash equivalents, restricted cash short-term, restricted cash, or available-for-sale securities as of June 30, 2023 and December 31, 2022. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (in thousands) | | | | | | | | | | Reported as: | | June 30, 2023 | | Amortized
Cost | | Unrealized
Gain | | Unrealized
(Loss) | | Fair Value | | Cash &
Cash
Equivalents | | Available-for-sale securities | | | | Restricted
Cash (Current and Non-Current) | | Cash | | $ | 132,434 | | | $ | — | | | $ | — | | | $ | 132,434 | | | $ | 127,373 | | | $ | — | | | | | $ | 5,061 | | | Level I: | | | | | | | | | | | | | | | | | Money market funds | | 25,018 | | | — | | | — | | | 25,018 | | | 25,018 | | | — | | | | | — | | Level II: | | | | | | | | | | | | | | | | | Corporate bonds | | 229,829 | | | — | | | (1,768) | | | 228,061 | | | — | | | 228,061 | | | | | — | | U.S. treasury securities | | 878,373 | | | 31 | | | (4,227) | | | 874,177 | | | — | | | 874,177 | | | | | — | | U.S. government agency securities | | 63,663 | | | 1 | | | (266) | | | 63,398 | | | — | | | 63,398 | | | | | — | | Commercial paper | | 266,597 | | | — | | | (4) | | | 266,593 | | | 6,927 | | | 259,666 | | | | | — | | Subtotal | | 1,438,462 | | | 32 | | | (6,265) | | | 1,432,229 | | | 6,927 | | | 1,425,302 | | | | | — | | Total assets measured at fair value on a recurring basis | | $ | 1,595,914 | | | $ | 32 | | | $ | (6,265) | | | $ | 1,589,681 | | | $ | 159,318 | | | $ | 1,425,302 | | | | | $ | 5,061 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (in thousands) | | | | | | | | | | Reported as: | | December 31, 2022 | | Amortized
Cost | | Unrealized
Gain | | Unrealized
(Loss) | | Fair
Value | | Cash &
Cash
Equivalents | | Available-for-sale securities | | | | Restricted
Cash (Current and Non-Current)
Cash | | Cash | | $ | 87,719 | | | $ | — | | | $ | — | | | $ | 87,719 | | | $ | 77,164 | | | $ | — | | | | | $ | 10,555 | | | Level I: | | | | | | | | | | | | | | | | | Money market funds | | 125,450 | | | — | | | — | | | 125,450 | | | 124,979 | | | — | | | | | 471 | | | Level II: | | | | | | | | | | | | | | | | | Corporate bonds | | 258,617 | | | 46 | | | (2,621) | | | 256,042 | | | 2,035 | | | 254,007 | | | | | — | | U.S. treasury securities | | 818,379 | | | 20 | | | (9,233) | | | 809,166 | | | — | | | 809,166 | | | | | — | | U.S. government agency securities | | 25,283 | | | — | | | (31) | | | 25,252 | | | — | | | 25,252 | | | | | — | | Commercial paper | | 357,334 | | | — | | | — | | | 357,334 | | | — | | | 357,334 | | | | | — | | Subtotal | | 1,459,613 | | | 66 | | | (11,885) | | | 1,447,794 | | | 2,035 | | | 1,445,759 | | | | | — | | Total assets measured at fair value on a recurring basis | | $ | 1,672,782 | | | $ | 66 | | | $ | (11,885) | | | $ | 1,660,963 | | | $ | 204,178 | | | $ | 1,445,759 | | | | | $ | 11,026 | |
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