Note 10 - Information by Industry Segment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Indicators and Gauges [Member]
Net Sales
Revenue	$ 271,937	$ 355,267	$ 514,060	$ 600,936
Income (Loss) before provision for Income Taxes
Income (Loss) before provision for Income Taxes	32,162	62,103	63,236	64,596
Asset Information
Assets	754,134	794,095	754,134	794,095
Revenue:
Revenue	271,937	355,267	514,060	600,936
Automotive Diagnostic Tools and Equipment [Member]
Net Sales
Revenue	774,687	735,915	1,909,436	1,652,464
Income (Loss) before provision for Income Taxes
Income (Loss) before provision for Income Taxes	(134,105)	(91,159)	37,128	(122,547)
Asset Information
Assets	1,613,917	1,575,734	1,613,917	1,575,734
Revenue:
Revenue	774,687	735,915	1,909,436	1,652,464
Corporate Segment [Member]
Income (Loss) before provision for Income Taxes
Income (Loss) before provision for Income Taxes	(362,501)	(247,607)	(611,997)	(489,368)
Asset Information
Assets	1,025,081	730,465	1,025,081	730,465
UNITED STATES
Net Sales
Revenue	1,015,090	1,068,123	2,344,709	2,195,582
Revenue:
Revenue	1,015,090	1,068,123	2,344,709	2,195,582
AUSTRALIA
Net Sales
Revenue	588	3,675	38,941	11,800
Revenue:
Revenue	588	3,675	38,941	11,800
CANADA
Net Sales
Revenue	5,798	15,896	14,698	35,554
Revenue:
Revenue	5,798	15,896	14,698	35,554
England [Member]
Net Sales
Revenue	20,260		20,260
Revenue:
Revenue	20,260		20,260
MEXICO
Net Sales
Revenue	4,360	3,488	4,360	10,464
Revenue:
Revenue	4,360	3,488	4,360	10,464
Other Foreign Countries [Member]
Net Sales
Revenue	528		528
Revenue:
Revenue	528		528
Revenue	1,046,624	1,091,182	2,423,496	2,253,400
Income (Loss) before provision for Income Taxes	(464,444)	(276,663)	(511,633)	(547,319)
Assets	3,393,132	3,100,294	3,393,132	3,100,294	$ 3,866,575
Revenue	$ 1,046,624	$ 1,091,182	$ 2,423,496	$ 2,253,400