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Stock Benefit Plans and Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Stock Option Activity | A summary of the Company’s stock option activity under the 2005 Plan and related information is as follows (in thousands, except as indicated and per share data):
| Shares |  | Weighted average exercise price |  | Weighted average remaining contractual term (in years) |  | Aggregate intrinsic value
Outstanding at December 31, 2014 | 8,267 |  |  | $ | 2.08 |  |  | 7.35 |  |  | $ | 71 |
Granted | 457 |  |  | $ | 1.28 |  |  | — |  |  | — |
Exercised | (5 | ) |  | $ | — |  |  | — |  |  | — |
Forfeited | (1,081 | ) |  | $ | 2.10 |  |  | — |  |  | — |
Outstanding at December 31, 2015 | 7,638 |  |  | $ | 2.03 |  |  | 6.36 |  |  | $ | — |
Options vested and exercisable at December 31, 2015 | 5,170 |  |  | $ | 2.25 |  |  | 5.63 |  |  | $ | — |
Options vested and expected to vest at December 31, 2015 | 7,304 |  |  | $ | 2.05 |  |  | 6.25 |  |  | $ | — |
Summary of Information about Restricted Stock Awards Activity | The following table summarizes information about the restricted stock awards activity (in thousands, except as indicated and per share data):
| Shares |  | Weighted average grant date fair value |  | Weighted average remaining recognition period (in years)
Unvested at December 31, 2014 | 690 |  |  | $ | 1.60 |  |  | 1.83
Awarded | 291 |  |  | $ | 1.36 |  |  |
Vested | (243 | ) |  | $ | 1.44 |  |  |
Forfeited | (5 | ) |  | $ | 1.80 |  |  |
Unvested at December 31, 2015 | 733 |  |  | $ | 1.55 |  |  | 0.88
Schedule of Performance-Based Units, Vested, Granted, and Forfeited | The recognition of compensation expense associated with PSUs requires judgment in assessing the probability of meeting the performance goals, as well as defined criteria for assessing achievement of the performance-related goals (in thousands, except as indicated and per share data):
| Shares |  | Weighted average grant date fair value |  | Weighted average remaining recognition period (in years)
Unvested at December 31, 2014 | 854 |  |  | $ | 1.42 |  |  | 2.00
Awarded | 1,854 |  |  | $ | 1.34 |  |  |
Vested | — |  |  | $ | — |  |  |
Forfeited | (338 | ) |  | $ | 1.36 |  |  |
Unvested at December 31, 2015 | 2,370 |  |  | $ | 1.37 |  |  | 1.67
Summary of Common Stock Reserved for Future Issuance | Common stock reserved for future issuance consists of the following (in thousands):
| December 31, 2015
Stock options outstanding | 7,638 |
Awards outstanding | 733 |
Performance restricted stock units outstanding | 2,370 |
Warrants outstanding | 11,544 |
Authorized for future grant under 2005 Plan | 3,840 |
| 26,125 |

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- Definition Tabular disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both performance-based awards (or share units) outstanding and performance-based awards (or share units) fully vested and expected to vest at the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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