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Stockholders' Equity/(Deficit) (Tables) | 12 Months Ended
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Dec. 31, 2013
Equity [Abstract] |
Stock Options Valuation Assumptions | The assumptions used in the Black-Scholes model were as follows for stock options granted in the years ended December 31, 2013, 2012 and 2011:
|  | 2013 |  | 2012 |  | 2011
Risk-free interest rate |  | .41-1.28% |  | .39-.67% |  | 1.51-1.89%
Expected volatility of common stock |  | 59.2-68.2% |  | 65.3-71.6% |  | 69.0-70.0%
Dividend yield |  | 0% |  | 0% |  | 0%
Expected life of options |  | 3.0-4.1 years |  | 3.0-4.1 years |  | 3.0-4.1 years
Summary of Stock Option Activity | Additional information with respect to both plans stock option activity is as follows:
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding at December 31, 2010 |  |  | 3,537,236 |  |  | $ | 3.78 |
Granted |  |  | 633,835 |  |  | $ | 2.74 |
Exercised |  |  | — |  |  | $ | — |
Cancelled |  |  | (771,666 | ) |  | $ | 3.50 |
Outstanding at December 31, 2011 |  |  | 3,399,405 |  |  | $ | 3.78 |
Granted |  |  | 771,969 |  |  | $ | 2.85 |
Exercised |  |  | (15,150 | ) |  | $ | 2.61 |
Cancelled |  |  | (736,070 | ) |  | $ | 4.42 |
Outstanding at December 31, 2012 |  |  | 3,420,154 |  |  | $ | 3.31 |
Granted |  |  | 1,233,822 |  |  | $ | 2.99 |
Exercised |  |  | (204,500 | ) |  | $ | 2.24 |
Cancelled |  |  | (1,453,600 | ) |  | $ | 3.61 |
Outstanding at December 31, 2013 |  |  | 2,995,876 |  |  | $ | 3.31 |
Options exercisable at December 31, 2011 |  |  | 2,926,930 |  |  | $ | 3.79 |
Options exercisable at December 31, 2012 |  |  | 2,754,227 |  |  | $ | 3.44 |
Options exercisable at December 31, 2013 |  |  | 2,118,903 |  |  | $ | 2.94 |
Stock Options Outstanding | The following table summarizes information about stock options outstanding at December 31, 2013: Stock Options Outstanding
Range of Exercise Prices |  | Number of Shares Outstanding |  |  | Weighted Average Remaining Contractual Life in Years |  |  | Weighted Average Exercise Price |
$1.74 – $2.74 |  |  | 1,344,554 |  |  |  | 2.5 |  |  | $ | 2.69 |
$2.89 – $4.00 |  |  | 1,651,322 |  |  |  | 3.33 |  |  | $ | 3.13 |
|  |  | 2,995,876 |  |  |  | 2.94 |  |  | $ | 2.93 |
Estimated Fair Value of Restricted Stock Award | A summary of the status of the restricted stock awards as of December 31, 2013 and changes during the year ended December 31, 2013 is presented as follows:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested at December 31, 2012 |  |  | 178,807 |  |  | $ | 2.73 |
Granted |  |  | 411,383 |  |  | $ | 2.89 |
Vested |  |  | (402,065 | ) |  | $ | 2.81 |
Cancelled |  |  | — |  |  | $ | — |
Unvested at December 31, 2013 |  |  | 188,125 |  |  | $ | 2.89 |
Summary of Common Stock Warrants Outstanding | The following table summarizes our common stock warrants outstanding at December 31, 2013:
Common Stock Warrants |  | Exercise Price |  | Termination Date
525,000 |  | $2.44 |  | 4/13/2014
1,562,500 |  | $3.60 |  | 11/9/2016
2,087,500 |  |  |  |

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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 option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -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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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Article 5 + Details
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