Segment Information Total Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Sep. 30, 2018	[1]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 381,727	$ 372,146
IoT Products & Services Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		210,283	209,574
IoT Solutions Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		94,975	99,822
Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	[2]	$ 76,469	$ 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.