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Stock Award Plans and Stock Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Stock Award Plans and Stock Based Compensation |
Schedule of estimated weighted-average assumptions used in calculation of fair value of options granted |
|  | Years ended December 31, |
--- | --- | --- | ---
|  | 2012 |  | 2011 |  | 2010 |
Weighted-average expected volatility |  | 97.8%-113.55 | % | 97.8 | % | 97.8 | %
Weighted-average expected term |  | 3.8-6.1 years |  | 6.1 years |  | 6.2 years |
Risk-free interest rate |  | 0.45%-1.37 | % | 1.1%-2.4 | % | 1.5%-2.0 | %
Expected dividend yield |  | 0 | % | 0 | % | 0 | %
Summary of stock option activity |
|  | Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
|  | (in thousands) |  |  |  | (years) |  | (in thousands) |
Outstanding at December 31, 2009 |  |  | 17,368 |  | $ | 6.43 |  |  |  |  |  |  |
Granted |  |  | 5,310 |  |  | 1.61 |  |  |  |  |  |  |
Exercised |  |  | (704 | ) |  | 0.79 |  |  |  |  |  |  |
Canceled |  |  | (333 | ) |  | 1.23 |  |  |  |  |  |  |
Expired |  |  | (2,693 | ) |  | 18.26 |  |  |  |  |  |  |
Outstanding at December 31, 2010 |  |  | 18,948 |  |  | 3.70 |  |  |  |  |  |  |
Granted |  |  | 4,662 |  |  | 1.70 |  |  |  |  |  |  |
Exercised |  |  | (372 | ) |  | 0.77 |  |  |  |  |  |  |
Canceled |  |  | (654 | ) |  | 1.43 |  |  |  |  |  |  |
Expired |  |  | (1,491 | ) |  | 12.38 |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 21,093 |  |  | 2.76 |  |  |  |  |  |  |
Granted |  |  | 4,077 |  |  | .93 |  |  |  |  |  |  |
Exercised |  |  | (1,148 | ) |  | .84 |  |  |  |  |  |  |
Canceled |  |  | (1,225 | ) |  | 1.43 |  |  |  |  |  |  |
Expired |  |  | (1,537 | ) |  | 7.71 |  |  |  |  |  |  |
Outstanding at December 31, 2012 |  |  | 21,260 |  | $ | 2.24 |  |  | 6.39 |  | $ | 4,607 |
Exercisable at December 31, 2012 |  |  | 11,680 |  | $ | 2.99 |  |  | 5.59 |  | $ | 2,591 |
Options Vested or Expected to Vest at December 31, 2012(1) |  |  | 20,558 |  | $ | 2.27 |  |  | 6.44 |  | $ | 2,015 |
(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest is calculated by applying an estimated forfeiture rate to the unvested options.
Schedule of changes in the Company's non-vested restricted stock units |
|  | Shares/units |  | Weighted-Average Grant Date Fair Value per Share |
--- | --- | --- | --- | --- | ---
|  | (in thousands) |  |  |
Outstanding at December 31, 2009 |  |  | 604 |  | $ | 5.90 |
Granted |  |  | 695 |  |  | 1.72 |
Vested |  |  | (1,052 | ) |  | 3.30 |
Forfeited |  |  | (19 | ) |  | 2.94 |
Outstanding at December 31, 2010 |  |  | 228 |  | $ | 5.38 |
Granted |  |  | 121 |  |  | 2.50 |
Vested |  |  | (196 | ) |  | 5.81 |
Forfeited |  |  | (2 | ) |  | 6.01 |
Outstanding at December 31, 2011 |  |  | 151 |  | $ | 2.52 |
Granted |  |  | 864 |  |  | 1.65 |
Vested |  |  | (47 | ) |  | 2.82 |
Forfeited |  |  | (7 | ) |  | 1.62 |
Outstanding at December 31, 2012 |  |  | 961 |  | $ | 1.73 |

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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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- 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 Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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