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Goodwill and other Identifiable Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Goodwill [Line Items] |  |  |  |
Goodwill | $ 154,535 | [1] | $ 131,995 |
Acquisitions |  |  | 23,216 |
Foreign currency translation adjustment | (1,113) |  | (676) |
Goodwill | 153,422 |  | 154,535 | [1]
IoT Solutions |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 50,177 |  | 33,014 |
Acquisitions |  |  | 17,553 |
Foreign currency translation adjustment | (274) |  | (390) |
Goodwill | 49,903 |  | 50,177 |
IoT Products and Services |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 104,358 |  | 98,981 |
Acquisitions |  |  | 5,663 |
Foreign currency translation adjustment | (839) |  | (286) |
Goodwill | $ 103,519 |  | $ 104,358 |
[1] | Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which we adopted on October 1, 2018.

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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://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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