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Restricted Stock Awards (Tables) - Restricted stock | 9 Months Ended
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Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Restricted Stock Activity | A summary of restricted stock awards granted, vested, forfeited and unvested outstanding as of, and changes made during, the nine months ended September 30, 2017, is presented below (shares in thousands):
| Restricted Shares |  | Weighted Average Grant Price
Unvested restricted shares outstanding, December 31, 2016 | 363 |  |  | $ | 1.08 |
Granted | — |  |  | — |
Vested | (9 | ) |  | 1.47 |
Forfeited | — |  |  | — |
Unvested restricted shares outstanding, September 30, 2017 | 354 |  |  | $ | 1.07 |
Summary of Compensation Expense | Stock-based compensation expense related to restricted stock awards 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
Cost of revenue | $ | 2 |  |  | $ | 2 |  |  | $ | 5 |  |  | $ | 5 |
Research and development | 1 |  |  | 1 |  |  | 4 |  |  | 4 |
General and administrative | 12 |  |  | 24 |  |  | 36 |  |  | 165 |
| $ | 15 |  |  | $ | 27 |  |  | $ | 45 |  |  | $ | 174 |

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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 of the changes in outstanding nonvested 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)(2) -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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