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Stock Based Compensation (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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| Stock-based compensation [Line Items] | ||||||||||
| Stock-based compensation expense included in operating expense | $ 85,000 | $ 344,000 | $ 307,000 | $ 767,000 | ||||||
| Stock options granted (in shares) | 0 | 0 | 510,000 | 575,000 | ||||||
| Weighted average Black-Scholes fair value assumptions used to value grants [Abstract] | ||||||||||
| Expected life | 5 years 6 months | [1] | 6 years 15 days | [1] | ||||||
| Risk free interest rate (in hundredths) | 0.60% | 2.30% | ||||||||
| Expected volatility (in hundredths) | 96.00% | [2] | 123.00% | [2] | ||||||
| Expected dividend yield (in hundredths) | 0.00% | 0.00% | ||||||||
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Research and development [Member]
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| Stock-based compensation [Line Items] | ||||||||||
| Stock-based compensation expense included in operating expense | 9,000 | 103,000 | 83,000 | 282,000 | ||||||
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Selling, general and administrative [Member]
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| Stock-based compensation [Line Items] | ||||||||||
| Stock-based compensation expense included in operating expense | $ 76,000 | $ 241,000 | $ 224,000 | $ 485,000 | ||||||
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