|
Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2013
|
|---|---|
| Assets | |
| Total Assets | $ 57,306 |
|
Cash [Member]
|
|
| Assets | |
| Total Assets | 3,986 |
|
Money market securities [Member]
|
|
| Assets | |
| Total Assets | 15,077 |
|
Government securities [Member]
|
|
| Assets | |
| Total Assets | |
|
Corporate bonds and commercial paper [Member]
|
|
| Assets | |
| Total Assets | 38,243 |
|
Warrants [Member]
|
|
| Liabilities | |
| Liabilities | 1,087 |
|
Level 1 [Member]
|
|
| Assets | |
| Total Assets | 19,063 |
|
Level 1 [Member] | Cash [Member]
|
|
| Assets | |
| Total Assets | 3,986 |
|
Level 1 [Member] | Money market securities [Member]
|
|
| Assets | |
| Total Assets | 15,077 |
|
Level 1 [Member] | Government securities [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 1 [Member] | Corporate bonds and commercial paper [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 1 [Member] | Warrants [Member]
|
|
| Liabilities | |
| Liabilities | |
|
Level 2 [Member]
|
|
| Assets | |
| Total Assets | 38,243 |
|
Level 2 [Member] | Cash [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 2 [Member] | Money market securities [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 2 [Member] | Government securities [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 2 [Member] | Corporate bonds and commercial paper [Member]
|
|
| Assets | |
| Total Assets | 38,243 |
|
Level 2 [Member] | Warrants [Member]
|
|
| Liabilities | |
| Liabilities | |
|
Level 3 [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 3 [Member] | Cash [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 3 [Member] | Money market securities [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 3 [Member] | Government securities [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 3 [Member] | Corporate bonds and commercial paper [Member]
|
|
| Assets | |
| Total Assets | |
|
Level 3 [Member] | Warrants [Member]
|
|
| Liabilities | |
| Liabilities | $ 1,087 |