| Cash Equivalents and Investments |
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)
|
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 at December 31, 2017 consist of the following (in thousands):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Contractual maturity
(in days) |
Amortized Cost |
Unrealized gains |
Unrealized losses |
Fair Value |
Investments |
|
|
|
|
|
U.S. treasuries |
212-340 |
$ |
4,287 |
|
$ |
— |
|
$ |
(115 |
) |
$ |
4,172 |
|
Asset-backed securities |
197-365 |
2,709 |
|
— |
|
(14 |
) |
2,695 |
|
Asset-backed securities |
greater than 365 |
3,798 |
|
— |
|
(110 |
) |
3,688 |
|
Corporate bonds |
91-365 |
28,356 |
|
— |
|
(473 |
) |
27,882 |
|
Corporate bonds |
greater than 365 |
6,344 |
|
1 |
|
(108 |
) |
6,236 |
|
Total |
|
$ |
45,494 |
|
$ |
1 |
|
$ |
(820 |
) |
$ |
44,673 |
|
|