Segment Information Total Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Sep. 30, 2018	[1]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 383,535	$ 372,146
IoT Products & Services Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		216,601	209,574
IoT Solutions Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		94,844	99,822
Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	[2]	$ 72,090	$ 62,750

[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.

[2] Unallocated consists of cash and cash equivalents and current marketable securities.