|
Stock Plans (Details 3) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Total stock-based compensation expenses | $ 678 | $ 2,581 | $ 1,177 |
| Increase in basic net income (loss) per share | $ (0.01) | $ (0.04) | $ (0.02) |
| Increase in diluted net income (loss) per share | $ (0.01) | $ (0.04) | $ (0.02) |
|
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 | 378 | 1,560 | 371 |
|
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 | $ 300 | $ 1,021 | $ 806 |