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Restructuring (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 31, 2017 employee | Jun. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) employee | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($)
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | $ 453 | $ 1,656 | $ 0
Restructuring charge |  |  |  |  | 504 | 2,515
Payments for restructuring |  |  |  | (359) | (1,553) | (986)
Restructuring reversals |  |  |  | (87) | (203) |
Restructuring foreign currency fluctuation |  |  |  | (7) | 49 | 127
Restructuring reserve, ending balance |  |  | $ 453 | 0 | 453 | 1,656
Employee Severance | Manufacturing Transition |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | 147 | 0 | 0
Restructuring charge |  |  |  |  | 504 | 0
Payments for restructuring |  |  |  | (108) | (357) | 0
Restructuring reversals |  |  |  | (39) | 0 |
Restructuring foreign currency fluctuation |  |  |  | 0 | 0 | 0
Restructuring reserve, ending balance |  |  | 147 | 0 | 147 | 0
Employee Severance | 2017 Restructuring |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | 293 | 1,528 | 0
Restructuring charge |  |  |  |  | 0 | 2,258
Payments for restructuring |  |  |  | (233) | (1,035) | (845)
Restructuring reversals |  |  |  | (53) | (244) |
Restructuring foreign currency fluctuation |  |  |  | (7) | 44 | 115
Restructuring reserve, ending balance |  |  | 293 | 0 | 293 | 1,528
Facility Closing | 2017 Restructuring |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | 13 | 128 | 0
Restructuring charge |  |  |  |  | 0 | 257
Payments for restructuring |  |  |  | (18) | (161) | (141)
Restructuring reversals |  |  |  | 5 | 41 |
Restructuring foreign currency fluctuation |  |  |  | 0 | 5 | 12
Restructuring reserve, ending balance |  |  | $ 13 | $ 0 | $ 13 | $ 128
IoT Products & Services | Manufacturing Transition |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of positions eliminated | employee |  |  | 53 |  |  |
IoT Products & Services | 2017 Restructuring |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring charge |  | $ 2,500 |  |  |  |
IoT Products & Services | Employee Severance | Manufacturing Transition |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring charge |  |  | $ 500 |  |  |
IoT Products & Services | Employee Severance | 2017 Restructuring |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring charge |  | 2,300 |  |  |  |
IoT Products & Services | Contract Termination | 2017 Restructuring |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring charge |  | $ 200 |  |  |  |
IoT Products & Services | UNITED STATES | 2017 Restructuring |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of positions eliminated | employee | 10 |  |  |  |  |
IoT Products & Services | FRANCE | 2017 Restructuring |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of positions eliminated | employee | 8 |  |  |  |  |

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