|
Stock Plans (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Total stock-based compensation expenses | $ 60 | $ 130 | $ 386 | $ 635 |
|
Research and Development Expense [Member]
|
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Total stock-based compensation expenses | 28 | 52 | 173 | 356 |
|
General and Administrative Expense [Member]
|
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Total stock-based compensation expenses | $ 32 | $ 78 | $ 213 | $ 279 |