|
Fair value measurement (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Assets: | ||
| Restricted cash | $ 30 | $ 30 |
|
Recurring basis | Level 1
|
||
| Assets: | ||
| Cash equivalents | 42,127 | 39,001 |
| Restricted cash | 30 | 30 |
| Total assets | 42,157 | 39,031 |
|
Recurring basis | Level 2
|
||
| Assets: | ||
| Cash equivalents | 2,460 | |
| Marketable securities | 36,493 | 41,558 |
| Total assets | 36,493 | 44,018 |
|
Recurring basis | Level 3
|
||
| Liabilities: | ||
| Contingent consideration | (1,269) | |
| Total liabilities | (1,269) | |
|
Recurring basis | Total
|
||
| Assets: | ||
| Cash equivalents | 42,127 | 41,461 |
| Marketable securities | 36,493 | 41,558 |
| Restricted cash | 30 | 30 |
| Total assets | 78,650 | 83,049 |
| Liabilities: | ||
| Contingent consideration | (1,269) | |
| Total liabilities | $ (1,269) |