Segment Information and Major Customers Expended for Property, Plant and Equipment by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Payments to Acquire Property Plant and Equipment by Segment [Line Items]
Expended for property, plant and equipment	$ 1,773	$ 2,729	$ 4,500
M2M
Payments to Acquire Property Plant and Equipment by Segment [Line Items]
Expended for property, plant and equipment	1,738	2,641	4,500
Solutions
Payments to Acquire Property Plant and Equipment by Segment [Line Items]
Expended for property, plant and equipment	$ 35	$ 88	$ 0