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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
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, 2017 and 2016:
|  | December 31, 2017 |  |  | December 31, 2016 |
|  | Number of Stock Options |  |  | Weighted Average Exercise Price |  |  | Number of Stock Options |  |  | Weighted Average Exercise Price |
Stock options outstanding at beginning of period |  |  | 110,828 |  |  | $ | 18.24 |  |  |  | 326,424 |  |  | $ | 24.89 |
Granted |  |  | 189,164 |  |  |  | 1.40 |  |  |  | - |  |  |  | - |
Expired |  |  | (13,818 | ) |  |  | 50.88 |  |  |  | (210,872 | ) |  |  | 19.13 |
Canceled or forfeited |  |  | - |  |  |  | - |  |  |  | (4,724 | ) |  |  | 438.89 |
Stock options outstanding at end of period |  |  | 286,174 |  |  | $ | 5.53 |  |  |  | 110,828 |  |  | $ | 18.24 |
Stock options exercisable at end of period |  |  | 97,010 |  |  | $ | 13.59 |  |  |  | 110,723 |  |  | $ | 18.22 |
Summary of Stock Options Outstanding and Exercisable by Stock Option Plan | The following table summarizes stock options outstanding and exercisable by stock option plan at December 31, 2017:
|  | Outstanding Stock Options |  |  | Exercisable Stock Options |
Stock Option Plan |  | Number of Stock Options Outstanding |  |  | Weighted Average Exercise Price |  |  | Number of Stock Options Exercisable |  |  | Weighted Average Exercise Price |
2004 Plan |  |  | 4,792 |  |  | $ | 35.14 |  |  |  | 4,792 |  |  | $ | 35.14 |
2004 Directors’ Plan |  |  | 973 |  |  |  | 317.14 |  |  |  | 973 |  |  |  | 317.14 |
2013 Plan |  |  | 189,581 |  |  |  | 1.48 |  |  |  | 417 |  |  |  | 35.88 |
Replacement Stock Options |  |  | 90,828 |  |  |  | 9.09 |  |  |  | 90,828 |  |  |  | 9.09 |
|  |  | 286,174 |  |  | $ | 5.53 |  |  |  | 97,010 |  |  | $ | 13.59 |
Summary of Status of Non-Vested Restricted Shares | The following table summarizes RSU activity for the years ending December 31, 2017 and 2016:
|  | December 31, 2017 |  |  | December 31, 2016 |
|  | Number of RSUs |  |  | Weighted- Average Grant Date Fair Value |  |  | Number of RSUs |  |  | Weighted- Average Grant Date Fair Value |
Unvested RSUs at beginning of period |  |  | 8,649 |  |  | $ | 43.71 |  |  |  | 32,699 |  |  | $ | 34.25 |
Granted |  |  | 304,064 |  |  |  | 1.40 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (34,845 | ) |  |  | 5.72 |  |  |  | (7,627 | ) |  |  | 34.61 |
Vested |  |  | (98,971 | ) |  |  | 2.50 |  |  |  | (16,423 | ) |  |  | 29.09 |
Unvested RSUs at end of period |  |  | 178,897 |  |  | $ | 1.40 |  |  |  | 8,649 |  |  | $ | 43.71 |
Summary of Restricted Stock Awards | The following table summarizes RSA activity during the years ended December 31, 2017 and 2016:
|  | December 31, 2017 |  |  | December 31, 2016 |
|  | Number of RSAs |  |  | Weighted- Average Grant Date Fair Value |  |  | Number of RSAs |  |  | Weighted- Average Grant Date Fair Value |
Unvested RSAs at beginning of period |  |  | - |  |  | $ | - |  |  |  | 1,366 |  |  | $ | 40.01 |
Forfeited |  |  | - |  |  |  | - |  |  |  | (410 | ) |  |  | 44.84 |
Vested |  |  | - |  |  |  | - |  |  |  | (956 | ) |  |  | 37.94 |
Unvested RSAs at end of period |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |

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- Definition Tabular disclosure of employee stock purchase plan activity. + 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 (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&loc=d3e5070-113901 + Details
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