|
Organization and Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2012
|
Sep. 30, 2011
|
|
| Fair value of the warrant liability | ||||
| Fair value, beginning of period | $ 4,535 | $ 7,103 | $ 3,611 | |
| Issuance of warrants | 2,863 | 5,473 | ||
| Change in fair value | 3,673 | (2,390) | 1,734 | (760) |
| Fair value, end of period | $ 8,208 | $ 4,713 | $ 8,208 | $ 4,713 |