Net Income (Loss) Per Common Share - Warrants, Options and Purchase Rights Excluded from Computation of Diluted Net Loss Per Share (Detail)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
|
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Employee Stock Purchase Plan (ESPP) [Member]
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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Shares issuable | 28 | 48 | 28 | 48 |
Warrants [Member]
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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Shares issuable | 4,034 | 11,726 | ||
Employee Stock Options [Member]
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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Shares issuable | 6,560 | 5,129 | 6,560 | 5,129 |