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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Stock Options Outstanding | The following table summarizes stock options outstanding and changes during the years ended December 31, 2014 and 2013:
|  | 2014 |  |  | 2013 |
|  | Number of stock options |  |  | Weighted Average Exercise Price |  |  | Number of stock options |  |  | Weighted Average Exercise Price |
Stock options outstanding at beginning of period |  |  | 309,479 |  |  | $ | 19.75 |  |  |  | 317,270 |  |  | $ | 24.62 |
Granted |  |  | - |  |  |  | - |  |  |  | 65,000 |  |  |  | 2.86 |
Exercised |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Expired |  |  | (134,731 | ) |  |  | 12.07 |  |  |  | - |  |  |  | - |
Canceled or forfeited |  |  | (14,000 | ) |  |  | 31.31 |  |  |  | (72,791 | ) |  |  | 25.90 |
Stock options outstanding at end of period |  |  | 160,748 |  |  | $ | 25.18 |  |  |  | 309,479 |  |  | $ | 19.75 |
Stock options exercisable at end of period |  |  | 115,333 |  |  | $ | 33.81 |  |  |  | 226,980 |  |  | $ | 25.57 |
Summary of Fair Value of Stock Options Granted to Employees and Directors | The fair value of stock options granted to employees and directors was estimated at the grant date using the Black-Scholes option pricing model using the following assumptions:
|  | Years ended December 31,
|  | 2014 |  | 2013
Expected volatility |  | N/A |  | 84% - 111%
Risk-free interest rate |  | N/A |  | 1.40% - 2.63%
Expected life (years) |  | N/A |  | 2.7 - 7.8
Dividend yield |  | N/A |  | N/A
Summary of Status of Non-Vested Restricted Shares | The following table summarizes RSU activity for the years ending December 31, 2014 and 2013:
|  | 2014 |  |  | 2013 |
|  | Number of restricted stock units |  |  | Weighted-Average Grant Date Fair Value |  |  | Number of restricted stock units |  |  | Weighted-Average Grant Date Fair Value |
Unvested RSUs at beginning of period |  |  | 280,000 |  |  | $ | 3.31 |  |  |  | - |  |  | $ | - |
Granted |  |  | 431,941 |  |  |  | 2.61 |  |  |  | 280,000 |  |  |  | 3.31 |
Forfeited |  |  | (29,778 | ) |  |  | 3.38 |  |  |  | - |  |  |  | - |
Vested |  |  | (137,353 | ) |  |  | 2.95 |  |  |  | - |  |  |  | - |
Unvested RSUs at end of period |  |  | 544,810 |  |  | $ | 2.84 |  |  |  | 280,000 |  |  | $ | 3.31 |
Summary of Restricted Stock Awards | The following table summarizes RSA activity during the years ended December 31, 2014 and 2013:
|  | 2014 |  |  | 2013 |
|  | Number of RSAs |  |  | Weighted-Average Grant Date Fair Value |  |  | Number of RSAs |  |  | Weighted-Average Grant Date Fair Value |
Unvested RSAs at beginning of period |  |  | 54,151 |  |  | $ | 5.49 |  |  |  | 40,870 |  |  | $ | 9.10 |
Granted |  |  | - |  |  |  | - |  |  |  | 50,000 |  |  |  | 2.73 |
Forfeited |  |  | (5,601 | ) |  |  | 5.39 |  |  |  | (4,220 | ) |  |  | 12.74 |
Vested |  |  | (21,880 | ) |  |  | 5.85 |  |  |  | (32,499 | ) |  |  | 4.85 |
Unvested RSAs at end of period |  |  | 26,670 |  |  | $ | 5.21 |  |  |  | 54,151 |  |  | $ | 5.49 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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) -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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