Segment Reporting (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2021 USD ($) carrier	Dec. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of U.S. wireless carriers | carrier	4
Gross profit	$ 4,631	$ 3,629
Income (loss) from operations	(1,902)	(1,914)
Segment assets	25,426		$ 27,312
Operating segments
Segment Reporting Information [Line Items]
Sales	18,690	12,749
Income (loss) from operations	(1,902)	(1,914)
Non-allocated
Segment Reporting Information [Line Items]
Segment assets	3,241		4,973
Wireless | Operating segments
Segment Reporting Information [Line Items]
Sales	7,119	5,247
Gross profit	1,507	1,609
Income (loss) from operations	(2,326)	(1,105)
Wireless | Operating segments | Continuing Operations
Segment Reporting Information [Line Items]
Segment assets	7,640		7,867
Telco | Operating segments
Segment Reporting Information [Line Items]
Sales	11,571	7,502
Gross profit	3,124	2,020
Income (loss) from operations	424	$ (809)
Telco | Operating segments | Continuing Operations
Segment Reporting Information [Line Items]
Segment assets	$ 14,545		$ 14,472