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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of Stock Option Activity | The following table summarizes the activity for stock options and warrants for the six months ended June 30, 2018:
|  | Stock Options |  | Warrants
|  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (In Thousands) |  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2017 |  | 1,072,499 |  |  | $ | 33.50 |  |  | 4.76 |  | $ | 0.1 |  |  | 209,818 |  |  | $ | 53.20 |  |  | 0.95 |  | $ | — |
Changes during the period: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  | 144,310 |  |  | 3.80 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Exercised |  | (74,622 | ) |  | 4.60 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Forfeited |  | (3,030 | ) |  | 3.80 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Expired |  | (65,941 | ) |  | 24.50 |  |  |  |  |  |  | (161,164 | ) |  | 50.30 |  |  |  |  |
Outstanding at June 30, 2018 |  | 1,073,216 |  |  | $ | 31.50 |  |  | 5.42 |  | $ | 1,237.5 |  |  | 48,654 |  |  | $ | 59.84 |  |  | 2.95 |  | $ | 17.4 |
Vested at June 30, 2018 or expected to vest in the future |  | 1,061,160 |  |  | $ | 31.80 |  |  | 5.37 |  | $ | 1,205.7 |  |  | 48,654 |  |  | $ | 59.84 |  |  | 2.95 |  | $ | 17.4 |
Vested at June 30, 2018 |  | 963,497 |  |  | $ | 34.60 |  |  | 4.95 |  | $ | 950.5 |  |  | 48,654 |  |  | $ | 59.84 |  |  | 2.95 |  | $ | 17.4 |
Schedule of Restricted Stock | During the six months ended June 30, 2018 and 2017, the Company issued restricted stock for services as follows ($ in thousands):
|  | Six Months Ended June 30,
|  | 2018 |  | 2017
Number of restricted stock issued |  | 127,688 |  |  | 132,726 |
Value of restricted stock issued |  | $ | 351 |  |  | $ | 470 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -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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