| Marketable securities |
|
June 30, 2019
|
|
| |
|
Cost
Basis
|
|
|
Gross Unrealized Gains |
|
|
Gross Unrealized Losses |
|
|
Fair Value |
|
| Certificates of deposit |
|
$ |
6,998,000 |
|
|
$ |
8,000 |
|
|
$ |
― |
|
|
$ |
7,006,000 |
|
| Short term bond funds |
|
|
13,970,000 |
|
|
|
37,000 |
|
|
|
― |
|
|
|
14,007,000 |
|
| Corporate bonds and notes |
|
|
11,021,000 |
|
|
|
145,000 |
|
|
$ |
(63,000 |
) |
|
$ |
11,103,000 |
|
| Total marketable securities |
|
$ |
31,989,000 |
|
|
$ |
190,000 |
|
|
$ |
(63,000 |
) |
|
$ |
32,116,000 |
|
|
December 31, 2018
|
|
| |
|
Cost
Basis
|
|
|
Gross Unrealized Gains |
|
|
Gross Unrealized Losses |
|
|
Fair Value |
|
| Certificates of deposit |
|
$ |
13,151,000 |
|
|
$ |
― |
|
|
$ |
― |
|
|
$ |
13,151,000 |
|
| Short term bond funds |
|
|
9,648,000 |
|
|
|
― |
|
|
|
(8,000 |
) |
|
|
9,640,000 |
|
| Corporate bonds and notes |
|
|
8,518,000 |
|
|
|
― |
|
|
|
(81,000 |
) |
|
|
8,437,000 |
|
| Total marketable securities |
|
$ |
31,317,000 |
|
|
|
― |
|
|
$ |
(89,000 |
) |
|
$ |
31,228,000 |
|
|