| Cash Equivalents and Investments Carried at Fair Value |
The following table presents the cash equivalents and investments carried at fair value in accordance with the hierarchy defined in Note 2 (in thousands):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total |
Quoted prices in active markets (Level 1) |
Significant other observable inputs (Level 2) |
Significant unobservable inputs
(Level 3)
|
March 31, 2018 |
|
|
|
|
Money market funds, included in cash equivalents |
$ |
67,752 |
|
$ |
67,752 |
|
$ |
— |
|
$ |
— |
|
U.S. treasuries, included in cash equivalents |
6,198 |
|
6,198 |
|
— |
|
— |
|
Corporate bonds, included in cash equivalents |
18,991 |
|
— |
|
18,991 |
|
— |
|
Asset-backed securities, included in cash equivalents |
899 |
|
— |
|
899 |
|
— |
|
Investments - U.S. treasuries |
4,175 |
|
4,175 |
|
— |
|
— |
|
Investments - Asset-backed securities |
7,310 |
|
— |
|
7,310 |
|
— |
|
Investments - Corporate bonds |
41,158 |
|
— |
|
41,158 |
|
— |
|
Total |
$ |
146,483 |
|
$ |
78,125 |
|
$ |
68,358 |
|
$ |
— |
|
|
|
|
|
|
December 31, 2017 |
|
|
|
|
Money market funds, included in cash equivalents |
$ |
4,583 |
|
$ |
4,583 |
|
$ |
— |
|
$ |
— |
|
Corporate bonds, included in cash equivalents |
13,595 |
|
— |
|
13,595 |
|
— |
|
Investments - U.S. treasuries |
4,172 |
|
4,172 |
|
— |
|
— |
|
Investments - Asset-backed securities |
6,384 |
|
— |
|
6,384 |
|
— |
|
Investments - Corporate bonds |
34,117 |
|
— |
|
34,117 |
|
— |
|
Total |
$ |
62,851 |
|
$ |
8,755 |
|
$ |
54,096 |
|
$ |
— |
|
|
| Cash Equivalents and Investments |
Cash equivalents and investments at March 31, 2018 consist of the following (in thousands):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractual maturity
(in days) |
Amortized Cost |
Unrealized gains |
Unrealized losses |
Fair Value |
Investments |
|
|
|
|
|
U.S. treasuries |
122-250 |
$ |
4,373 |
|
$ |
— |
|
$ |
(198 |
) |
$ |
4,175 |
|
Asset-backed securities |
107-292 |
5,682 |
|
— |
|
(159 |
) |
5,523 |
|
Asset-backed securities |
greater than 365 |
1,879 |
|
— |
|
(92 |
) |
1,787 |
|
Corporate bonds |
25-356 |
41,257 |
|
13 |
|
(908 |
) |
40,362 |
|
Corporate bonds |
greater than 365 |
802 |
|
— |
|
(6 |
) |
796 |
|
Total |
|
$ |
53,993 |
|
$ |
13 |
|
$ |
(1,363 |
) |
$ |
52,643 |
|
|