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Restructuring Charge (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Restructuring Charge |  |
Summary of restructuring charges | Restructuring activity was as follows (in thousands):
|  |  |  |  | Contractual obligations |  |  |  |
|  | Workforce |  | and other |  |  |  |
|  | reduction |  | termination costs |  | Total |
Balance as of March 31, 2017 |  | $ | — |  | $ | — |  | $ | — |
Restructuring charge |  |  | 458 |  |  | 594 |  |  | 1,052 |
Cash payments |  |  | (458) |  |  | (119) |  |  | (577) |
Balance as of September 30, 2017 |  | $ | — |  | $ | 475 |  | $ | 475 |
| Expenses related to the restructure are included in the restructuring charges line on the condensed consolidated statements of operations and comprehensive loss and the remaining liability is included in accrued expenses and other on the condensed consolidated balance sheet consisting of (in thousands):
|  |  |  |  | Facility related |  |  |  |
|  | Workforce |  | and other |  |  |  |
|  | reduction |  | termination costs |  | Total |
Balance as of December 31, 2015 |  | $ | — |  | $ | — |  | $ | — |
Restructuring charge |  |  | 561 |  |  | 115 |  |  | 676 |
Non-cash settlements |  |  | — |  |  | (46) |  |  | (46) |
Cash payments |  |  | (561) |  |  | (64) |  |  | (625) |
Balance as of December 31, 2016 |  | $ | — |  | $ | 5 |  | $ | 5 |

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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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