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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Share-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
December 31, 2012: |  |  |  |  |  |  |
Employees | 93% |  | 0.8% |  | 5 |  | 0 | %
Officers and non-employee directors | 81% |  | 1.5% |  | 8 |  | 0 | %
December 31, 2011: |  |  |  |  |  |  |
Employees | 88% |  | 2.2% |  | 5 |  | 0 | %
Officers and non-employee directors | 78% |  | 3.2% |  | 8 |  | 0 | %
December 31, 2010: |  |  |  |  |  |  |
Employees | 86% |  | 2.3% |  | 5 |  | 0 | %
Officers and non-employee directors | 80% |  | 3.3% |  | 8 |  | 0 | %

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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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- Details
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