Segment Information and Major Customers Expended for Property, Plant and Equipment by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Expended for property, plant and equipment	$ 899	$ 9,335	$ 1,842
IoT Products & Services
Segment Reporting Information [Line Items]
Expended for property, plant and equipment	878	8,863	1,773
IoT Solutions
Segment Reporting Information [Line Items]
Expended for property, plant and equipment	$ 21	$ 472	$ 69