| Investments |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
December 31, 2022 |
| (in thousands) |
|
Amortized Cost |
|
Unrealized Gains |
|
Unrealized Losses |
|
Estimated Fair Value |
| Cash, cash equivalents and restricted cash |
|
$ |
94,172
|
|
|
$ |
—
|
|
|
$ |
—
|
|
|
$ |
94,172
|
|
| U.S. agency security |
|
4,951
|
|
|
—
|
|
|
(3) |
|
|
4,948
|
|
| Corporate bond |
|
104,174
|
|
|
—
|
|
|
(94) |
|
|
104,080
|
|
| Commercial paper |
|
125,255
|
|
|
—
|
|
|
(68) |
|
|
125,187
|
|
| Treasury bill |
|
12,290
|
|
|
—
|
|
|
(8) |
|
|
12,282
|
|
| Treasury bond |
|
42,301
|
|
|
—
|
|
|
(81) |
|
|
42,220
|
|
| Yankee bond |
|
6,503
|
|
|
—
|
|
|
(2) |
|
|
6,501
|
|
| Total cash, cash equivalents, restricted cash and short-term investments |
|
$ |
389,646
|
|
|
$ |
—
|
|
|
$ |
(256) |
|
|
$ |
389,390
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2021 |
| (in thousands) |
|
Amortized Cost |
|
Unrealized Gains |
|
Unrealized Losses |
|
Estimated Fair Value |
| Cash, cash equivalents and restricted cash |
|
$ |
231,900 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
231,900 |
|
| Certificates of deposit |
|
3,144 |
|
|
— |
|
|
(4) |
|
|
3,140 |
|
| Corporate bond |
|
2,593 |
|
|
— |
|
|
(1) |
|
|
2,592 |
|
| Commercial paper |
|
206,764 |
|
|
— |
|
|
(40) |
|
|
206,724 |
|
| Treasury bill |
|
2,496 |
|
|
— |
|
|
(2) |
|
|
2,494 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Total |
|
$ |
446,897 |
|
|
$ |
— |
|
|
$ |
(47) |
|
|
$ |
446,850 |
|
| Held-to-maturity securities corporate bond |
|
19,228 |
|
|
|
|
|
|
19,228 |
|
| Total cash, cash equivalents, restricted cash and short-term investments |
|
|
|
|
|
|
|
$ |
466,078 |
|
|