Fair Value Measurements (Details) - USD ($)
$ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
| Assets: |
|
|
| Marketable securities |
$ 77,998
|
$ 74,372
|
| Foreign currency derivative contracts |
|
45
|
| Total financial assets |
77,998
|
74,417
|
| Liabilities: |
|
|
| Payment obligation related to acquisition |
356
|
334
|
| Foreign currency derivative contracts |
52
|
|
| Total liabilities |
408
|
334
|
| Level 1 [Member] |
|
|
| Assets: |
|
|
| Marketable securities |
|
|
| Foreign currency derivative contracts |
|
|
| Total financial assets |
|
|
| Liabilities: |
|
|
| Payment obligation related to acquisition |
|
|
| Foreign currency derivative contracts |
|
|
| Total liabilities |
|
|
| Level 2 [Member] |
|
|
| Assets: |
|
|
| Marketable securities |
77,998
|
74,372
|
| Foreign currency derivative contracts |
|
45
|
| Total financial assets |
77,998
|
74,417
|
| Liabilities: |
|
|
| Payment obligation related to acquisition |
|
|
| Foreign currency derivative contracts |
52
|
|
| Total liabilities |
52
|
|
| Level 3 [Member] |
|
|
| Assets: |
|
|
| Marketable securities |
|
|
| Foreign currency derivative contracts |
|
|
| Total financial assets |
|
|
| Liabilities: |
|
|
| Payment obligation related to acquisition |
356
|
334
|
| Total liabilities |
$ 356
|
$ 334
|