Segment Information and Major Customers Expended for Property, Plant and Equipment by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Expended for property, plant and equipment	$ 2,257	$ 899	$ 9,335
Inventory Transfer To Property, Plant And Equipment	1,838	1,363	1,064
IoT Products & Services
Segment Reporting Information [Line Items]
Expended for property, plant and equipment	2,257	878	8,863
IoT Solutions
Segment Reporting Information [Line Items]
Expended for property, plant and equipment	$ 0	$ 21	$ 472