Segment Information and Major Customers Total Assets by Segment (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Sep. 30, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets		$ 345,189	$ 336,166
M2M
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets		182,555	184,917
Solutions
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets		47,644	13,599
Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	[1]	$ 114,990	$ 137,650

[1] Unallocated consists of cash and cash equivalents, current marketable securities and long-term marketable securities.