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Restructuring (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 USD ($) | Mar. 31, 2016 USD ($) position | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Total termination charges |  |  |  |  | $ 700
Severance benefits and other one-time termination costs |  |  |  |  | 600
Cash expenditures |  | $ 600 |  |  |
Restructuring charges |  |  |  |  |
Balance at the beginning of the period |  |  | $ 5 |  |
Restructuring charge | $ 50 |  | 1,052 | $ 676 | 676
Non-cash settlements |  |  |  |  | (46)
Cash payments |  |  | (577) |  | (625)
Balance at the end of the period | 475 |  | 475 |  | 5
Workforce reduction |  |  |  |  |
Restructuring charges |  |  |  |  |
Restructuring charge |  |  | 458 |  | 561
Cash payments |  |  | (458) |  | (561)
Facility related and other termination costs |  |  |  |  |
Restructuring charges |  |  |  |  |
Balance at the beginning of the period |  |  | 5 |  |
Restructuring charge |  |  | 594 |  | 115
Non-cash settlements |  |  |  |  | (46)
Cash payments |  |  | (119) |  | (64)
Balance at the end of the period | $ 475 |  | $ 475 |  | $ 5
United States |  |  |  |  |
Number of positions/employees terminated | position |  | 12 |  |  |
Hyderabad, India |  |  |  |  |
Number of positions/employees terminated | position |  | 18 |  |  |

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