The following table summarizes the amortized cost and estimated fair value of the Company's U.S. Treasury securities and U.S. government-sponsored enterprise securities, which are considered to be available-for-sale investments and were included in short-term investments and long-term investments on the condensed consolidated balance sheets (in thousands):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
March 31, 2023 |
|
|
|
Amortized Cost |
|
|
Gross Unrealized Gains |
|
|
Gross Unrealized Losses |
|
|
Fair Value |
|
Short-term investments: |
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities |
|
$ |
12,957 |
|
|
$ |
1 |
|
|
$ |
(6 |
) |
|
$ |
12,952 |
|
U.S. government-sponsored enterprise securities |
|
|
79,806 |
|
|
|
31 |
|
|
|
(66 |
) |
|
|
79,771 |
|
Long-term investments: |
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities |
|
|
9,706 |
|
|
|
14 |
|
|
|
— |
|
|
|
9,720 |
|
U.S. government-sponsored enterprise securities |
|
|
29,520 |
|
|
|
35 |
|
|
|
— |
|
|
|
29,555 |
|
|
|
$ |
131,989 |
|
|
$ |
81 |
|
|
$ |
(72 |
) |
|
$ |
131,998 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2022 |
|
|
|
Amortized Cost |
|
|
Gross Unrealized Gains |
|
|
Gross Unrealized Losses |
|
|
Fair Value |
|
Short-term investments: |
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities |
|
$ |
32,174 |
|
|
$ |
3 |
|
|
$ |
(34 |
) |
|
$ |
32,143 |
|
U.S. government-sponsored enterprise securities |
|
|
66,106 |
|
|
|
68 |
|
|
|
(85 |
) |
|
|
66,089 |
|
Long-term investments: |
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities |
|
|
7,242 |
|
|
|
— |
|
|
|
(4 |
) |
|
|
7,238 |
|
U.S. government-sponsored enterprise securities |
|
|
34,686 |
|
|
|
— |
|
|
|
(43 |
) |
|
|
34,643 |
|
|
|
$ |
140,208 |
|
|
$ |
71 |
|
|
$ |
(166 |
) |
|
$ |
140,113 |
|
|