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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2015
Stock-Based Compensation [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Expected Volatility |  | Risk-free Interest Rate |  | Expected Term |  | Dividend Rate
March 31, 2015: |  |  |  |  |  |  |  |
Employees |  | 63 | % |  | 1.2 | % |  | 4 |  | — | %
Officers and non-employee directors |  | 81 | % |  | 1.9 | % |  | 8 |  | — | %
March 31, 2014: |  |  |  |  |  |  |  |
Employees |  | 66 | % |  | 1.1 | % |  | 4 |  | — | %
Officers and non-employee directors |  | 80 | % |  | 2.3 | % |  | 8 |  | — | %
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Options |  | Weighted Average Exercise Price
|  | (in thousands) |  |
Outstanding at December 31, 2014 |  | 23,603 |  |  | $ | 2.14 |
Granted |  | 6,661 |  |  | 0.89 |
Expired |  | (585 | ) |  | 5.66 |
Forfeited |  | (408 | ) |  | 1.33 |
Outstanding at March 31, 2015 |  | 29,271 |  |  | 1.80 |
Exercisable at March 31, 2015 |  | 17,627 |  |  | $ | 2.12 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
|  | Shares |  | Weighted Average Grant Date Fair Value
|  | (in thousands) |  |
Outstanding at December 31, 2014 |  | 3,131 |  |  | $ | 1.84 |
Granted |  | 3,166 |  |  | 0.89 |
Vested |  | (1,166 | ) |  | 1.84 |
Forfeited |  | (336 | ) |  | 1.34 |
Nonvested at March 31, 2015 |  | 4,795 |  |  | $ | 1.25 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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 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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