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Stock-based Compensation - Allocation of Stock-based Compensation Expense (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2013
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Sep. 30, 2012
|
Sep. 30, 2013
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Sep. 30, 2012
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| Schedule of total stock-based compensation expense | ||||
| Total stock-based compensation expense | $ 683 | $ 520 | $ 1,862 | $ 1,503 |
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Research and development [Member]
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| Schedule of total stock-based compensation expense | ||||
| Total stock-based compensation expense | 318 | 146 | 860 | 373 |
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Sales and marketing [Member]
|
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| Schedule of total stock-based compensation expense | ||||
| Total stock-based compensation expense | 97 | 119 | 249 | 292 |
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General and administrative [Member]
|
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| Schedule of total stock-based compensation expense | ||||
| Total stock-based compensation expense | $ 268 | $ 255 | $ 753 | $ 838 |