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Stock Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Stock Option Activity | A summary of stock options granted, exercised, expired and forfeited under our stock incentive plans and stock options outstanding as of, and changes made during, the nine months ended September 30, 2017, is presented below (shares in thousands):
| Outstanding |  | Exercisable
| Number of Shares Underlying Options |  | Weighted Average Exercise Price |  | Number of Shares Underlying Options |  | Weighted Average Exercise Price
Options outstanding, December 31, 2016 | 1,222 |  |  | $ | 1.99 |  |  | 1,198 |  |  | $ | 1.99 |
Granted | — |  |  | — |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Expired | (10 | ) |  | 2.37 |  |  |  |  |
Forfeited | (6 | ) |  | 1.93 |  |  |  |  |
Options outstanding, September 30, 2017 | 1,206 |  |  | $ | 1.99 |  |  | 1,206 |  |  | $ | 1.99 |
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Compensation Expense | Stock-based compensation expense related to stock options is allocated as follows for the three and nine months ended September 30, 2017 and 2016 (in thousands):
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
General and administrative | $ | — |  |  | $ | 89 |  |  | $ | 18 |  |  | $ | 272 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -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 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + 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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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