Note 12 - Segment Reporting - Segment Reporting Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2019	Sep. 30, 2019
Sales	$ 11,959,125	$ 12,889,940	$ 25,921,483	$ 25,921,483	$ 19,700,037	$ 19,700,037
Gross profit	(438,637)	3,476,516	3,153,345	3,153,345	5,199,905	5,199,905
Operating income (loss)	(14,707,043)	(1,348,875)	(16,469,764)	(16,469,764)	(2,357,298)	$ (2,357,298)
Segment assets	33,114,682		33,114,682	33,114,682			$ 36,828,344
Operating Segments [Member] | Wireless [Member]
Sales	4,671,850	4,217,924	11,469,731		4,217,924
Gross profit	175,206	1,288,758	2,047,762		1,288,758
Operating income (loss)	(2,795,785)	(1,113,584)	(3,883,229)		(1,113,584)
Operating Segments [Member] | Wireless [Member] | Continuing Operations [Member]
Segment assets	7,174,283		7,174,283	7,174,283			5,515,793
Operating Segments [Member] | Telco [Member]
Sales	7,287,275	8,672,016	14,451,752		15,482,113
Gross profit	(613,843)	2,187,758	1,105,583		3,911,147
Operating income (loss)	(11,911,258)	$ (235,291)	(12,586,535)		$ (1,243,714)
Operating Segments [Member] | Telco [Member] | Continuing Operations [Member]
Segment assets	14,079,104		14,079,104	14,079,104			22,619,565
Segment Reconciling Items [Member]
Segment assets	$ 11,861,295		$ 11,861,295	$ 11,861,295			$ 8,692,986