Description of Stock Plans - Summary of Options Granted Under All Equity Plans (Detail) - Stock Option - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
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| Number of Shares (in shares) | ||||
| Beginning Balance | 5,993,975 | 5,533,225 | 5,789,758 | |
| Granted | 2,119,750 | 790,500 | 426,400 | |
| Forfeited/Canceled | (268,957) | (270,209) | (679,267) | |
| Exercised | (3,476) | (59,541) | (3,666) | |
| Ending Balance | 7,841,292 | 5,993,975 | 5,533,225 | 5,789,758 |
| Vested and expected to vest (net of estimated forfeitures) | 6,033,530 | |||
| Exercisable | 2,570,806 | |||
| Weighted Average Exercise Price ($ per share) | ||||
| Beginning Balance | $ 4.53 | $ 4.74 | $ 4.65 | |
| Ending Balance | 3.74 | $ 4.53 | $ 4.74 | $ 4.65 |
| Vested and expected to vest (net of estimated forfeitures) | 4.03 | |||
| Exercisable, December 31, 2015 | $ 5.73 | |||
| Weighted Average Remaining Contractual Life (in years) | ||||
| Outstanding | 8 years 5 months 5 days | 8 years 1 month 24 days | 8 years 2 months 5 days | 8 years 4 months 6 days |
| Aggregate Intrinsic Value (in $) | ||||
| Outstanding | $ 124 | $ 217 | $ 899 | $ 1,319 |
| Vested and expected to vest (net of estimated forfeitures) | 124 | |||
| Exercisable, December 31, 2015 | $ 101 | |||
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- Definition Aggregate intrinsic value. No definition available.
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- References No definition available.
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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