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Goodwill and Other Identifiable Intangible Assets, Net (Additional Information) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018
--- | --- | --- | ---
Goodwill [Line Items] |  |  |  |
Goodwill | $ 154,049 | $ 154,535 | [1] |
Market Capitalization |  |  |  | $ 359,600
IoT Products & Services Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 104,236 | 104,358 |  | $ 104,600
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount |  |  |  | 36.00%
IoT Solutions Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | $ 49,813 | $ 50,177 |  | $ 50,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount |  |  |  | 7.00%
Measurement Input, Control Premium [Member] | Minimum |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill Valuation Implied Control Premium |  |  |  | 5.70%
Measurement Input, Control Premium [Member] | Maximum |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill Valuation Implied Control Premium |  |  |  | 16.40%
[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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