|
Common Stock (Details) (USD $)
In Thousands, unless otherwise specified |
6 Months Ended | 72 Months Ended | |
|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
|
| Components of stock-based compensation | |||
| Total stock-based compensation expense | $ 1,218 | $ 529 | $ 5,092 |
|
Employee awards [Member]
|
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| Components of stock-based compensation | |||
| Total stock-based compensation expense | 812 | 238 | 1,548 |
|
Non-employee awards [Member]
|
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| Components of stock-based compensation | |||
| Total stock-based compensation expense | 242 | 128 | 3,055 |
|
Non-employee warrants [Member]
|
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| Components of stock-based compensation | |||
| Total stock-based compensation expense | $ 164 | $ 164 | $ 489 |