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Restricted Stock Units (Tables) - Restricted Stock Units (RSUs) | 6 Months Ended
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Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Restricted Stock Units Activity | A summary of unvested restricted stock units (“RSUs”) outstanding as of, and changes made during, the six months ended June 30, 2018, is presented below (shares in thousands):
| RSUs |  | Weighted Average Grant Price
Unvested restricted stock units outstanding, December 31, 2017 | 1,752 |  |  | $ | 0.57 |
Granted | 1,410 |  |  | 0.22 |
Vested | (306 | ) |  | 0.51 |
Forfeited | (463 | ) |  | 0.28 |
Unvested restricted stock units outstanding, June 30, 2018 | 2,393 |  |  | $ | 0.72 |
Summary of Compensation Expense | Stock-based compensation expense related to RSUs is allocated as follows (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Cost of revenue | $ | 12 |  |  | $ | 8 |  |  | $ | 17 |  |  | $ | 19 |
Research and development | 18 |  |  | 14 |  |  | 28 |  |  | 29 |
Sales and marketing | 2 |  |  | — |  |  | 4 |  |  | 4 |
General and administrative | 75 |  |  | 80 |  |  | 98 |  |  | 180 |
| $ | 107 |  |  | $ | 102 |  |  | $ | 147 |  |  | $ | 232 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109197908&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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