Note 9 - Segment Reporting Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating Segments [Member] | Cable TV [Member]
Sales	$ 5,942,856	$ 6,752,224	$ 16,966,744	$ 19,377,515
Gross profit	2,126,744	2,367,221	5,612,691	6,189,705
Operating income (loss)	528,651	846,372	981,770	1,813,022
Operating Segments [Member] | Telco [Member]
Sales	4,134,665	5,235,317	12,053,568	15,085,388
Gross profit	1,339,407	1,777,386	4,203,452	6,030,217
Operating income (loss)	(124,788)	95,833	(152,943)	325,884
Intersegment Eliminations [Member]
Sales	(17,279)	(85,150)	(123,215)	(356,815)
Sales	10,060,242	11,902,391	28,897,097	34,106,088
Gross profit	3,466,151	4,144,607	9,816,143	12,219,922
Operating income (loss)	$ 403,863	$ 942,205	$ 828,827	$ 2,138,906