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Stock Options and Stock Grants (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Assumptions Used to Calculate Black-Scholes Option Pricing Model for Stock Options Granted | The following table illustrates the various assumptions used to calculate the Black-Scholes option pricing model for options granted for all years presented:
|  | Years Ended December 31, |
|  | 2013 |  |  | 2012 |
Weighted-average risk-free interest rates: |  |  | 1.9 | % |  |  | 1.1 | %
Dividend yield: |  |  | 0.00 | % |  |  | 0.00 | %
Weighted-average expected life of the option: |  |  | 7 years |  |  |  | 7 years |
Weighted-average expected stock price volatility: |  |  | 95 | % |  |  | 86 | %
Weighted-average fair value of the options granted: |  | $ | 0.34 |  |  | $ | 0.23 |
Summary of Option Activity | The following table summarizes the option activity for our employees and directors during the year ended December 31, 2013:
Options |  | (rounded) Shares |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding on January 1, 2013 |  |  | 1,857,000 |  |  | $ | 1.69 |  |  |  |  |  |  |  |  |
Granted |  |  | 600,000 |  |  | $ | 0.42 |  |  |  |  |  |  |  |  |
Exercised |  |  | (23,000 | ) |  | $ | 0.30 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (340,000 | ) |  | $ | 1.80 |  |  |  |  |  |  |  |  |
Outstanding on December 31, 2013 |  |  | 2,094,000 |  |  | $ | 1.30 |  |  |  | 7.3 |  |  | $ | 188 |
Exercisable on December 31, 2013 |  |  | 1,096,000 |  |  | $ | 2.06 |  |  |  | 5.9 |  |  | $ | 40 |
Shares available for grant |  |  | 980,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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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 employee stock purchase plans, including, but not limited to: (a) expected term, (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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