Segment Information Total Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Sep. 30, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 560,904	$ 398,698
IoT Products & Services Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		415,843	215,651
IoT Solutions Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		95,989	90,255
Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	[1]	$ 49,072	$ 92,792

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