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Segment Information and Major Customers Goodwill by Segment (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Jun. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | --- | --- | ---
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Goodwill | $ 131,995 |  | $ 109,448 | $ 100,183
M2M |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Goodwill | 98,981 | $ 98,600 | 98,496 |
Solutions |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Goodwill | $ 33,014 | $ 32,500 | $ 10,952 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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