| Summary of Available-for-Sale Marketable Securities |
The following is a summary of available-for-sale marketable securities, excluding those securities classified within cash and cash equivalents, on the condensed consolidated balance sheets (in thousands):
|
|
|
March 31, 2020 |
|
|
|
|
Amortized
Cost |
|
|
Unrealized
Gain |
|
|
Unrealized
Losses |
|
|
Fair
Value |
|
|
Commercial debt securities |
|
$ |
321,534 |
|
|
$ |
60 |
|
|
$ |
(2,096 |
) |
|
$ |
319,498 |
|
|
Certificates of deposit |
|
|
39,865 |
|
|
|
54 |
|
|
|
— |
|
|
|
39,919 |
|
|
U.S. government agencies |
|
|
14,914 |
|
|
|
58 |
|
|
|
— |
|
|
|
14,972 |
|
|
U.S. government treasury securities |
|
|
106,033 |
|
|
|
1,023 |
|
|
|
— |
|
|
|
107,056 |
|
|
Commercial paper |
|
|
118,908 |
|
|
|
31 |
|
|
|
— |
|
|
|
118,939 |
|
|
Marketable securities |
|
$ |
601,254 |
|
|
$ |
1,226 |
|
|
$ |
(2,096 |
) |
|
$ |
600,384 |
|
|
|
|
December 31, 2019 |
|
|
|
|
Amortized
Cost |
|
|
Unrealized
Gain |
|
|
Unrealized
Losses |
|
|
Fair
Value |
|
|
Commercial debt securities |
|
$ |
80,376 |
|
|
$ |
46 |
|
|
$ |
(5 |
) |
|
$ |
80,417 |
|
|
U.S. government treasury securities |
|
|
72,467 |
|
|
|
10 |
|
|
|
(4 |
) |
|
|
72,473 |
|
|
Commercial paper |
|
|
23,784 |
|
|
|
— |
|
|
|
— |
|
|
|
23,784 |
|
|
Marketable securities |
|
$ |
176,627 |
|
|
$ |
56 |
|
|
$ |
(9 |
) |
|
$ |
176,674 |
|
|
| Summary of Fair Values of Available-for-Sale Marketable Securities, by Remaining Contractual Maturity |
As of March 31, 2020, the fair values of available-for-sale marketable securities, by remaining contractual maturity, were as follows (in thousands):
|
Due within one year |
|
$ |
478,459 |
|
|
Due in one year through five years |
|
|
121,925 |
|
|
Total |
|
$ |
600,384 |
|
|