Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Sales	$ 12,021,820	$ 17,559,315	$ 37,943,303	$ 37,259,352
Telco [Member] | Operating Segments [Member]
Sales	6,898,645	8,825,871	21,350,396	24,307,984
Wireless Services [Member]
Sales	5,123,176	8,733,444	16,592,907	12,951,368
Equipment Sales [Member] | Intersegment Eliminations [Member]
Sales	(23,033)	(5,305)	(23,033)	(49,452)
Equipment Sales [Member] | Telco [Member] | Operating Segments [Member]
Sales	6,147,676	7,989,318	19,912,137	22,876,047
Telco Repair [Member]
Sales	33,236	31,142	49,438	36,542
Telco Recycle [Member]
Sales	$ 740,765	$ 810,716	$ 1,411,854	$ 1,444,847