|
Fair Value of Financial Instruments (Details 2) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Jun. 30, 2012
|
Jun. 30, 2011
|
|
| Rollforward of fair value measurements using significant unobservable inputs (Level 3) for the warrants | ||||
| Beginning Balance | $ 4,538 | $ 983 | $ 983 | |
| Issuance of warrants March 2012 | 4,130 | |||
| Change in fair value of warrant liability | 96 | (479) | 78 | |
| Ending Balance | $ 4,634 | $ 4,538 | $ 4,634 | |