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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 | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 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 | 85 | 79 | 85 | 79 |
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Warrants [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Shares issuable | 9,634 | 9,634 | 12,615 | |
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Employee Stock Options [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Shares issuable | 6,570 | 5,072 | 6,570 | 5,072 |