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Organization and Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Numerator: | |||||||||||
| Net income (loss) used for basic earnings per share | $ 9,711 | $ (15,180) | $ (15,203) | ||||||||
| Less change in fair value of warrant liability | 1,737 | 0 | 1,862 | ||||||||
| Net (loss) income used for diluted earnings per share | $ 7,974 | $ (15,180) | $ (17,065) | ||||||||
| Denominator: | |||||||||||
| Basic weighted-average outstanding common shares | 82,099 | 66,509 | 59,324 | ||||||||
| Effect of dilutive potential common shares resulting from options | 493 | 0 | 906 | ||||||||
| Effect of dilutive potential common shares resulting from warrants | 67 | 0 | 162 | ||||||||
| Weighted-average shares outstanding—diluted | 82,659 | 66,509 | 60,392 | ||||||||
| Net income (loss) per common share: | |||||||||||
| Basic (in dollars per share) | $ 0.00 | $ (0.01) | $ 0.06 | $ 0.08 | $ 0.00 | $ (0.12) | $ (0.03) | $ (0.09) | $ 0.12 | $ (0.23) | $ (0.26) |
| Diluted (in dollars per share) | $ 0.00 | $ (0.01) | $ 0.00 | $ 0.07 | $ 0.00 | $ (0.12) | $ (0.06) | $ (0.09) | $ 0.10 | $ (0.23) | $ (0.28) |