Note 9 - Information by Industry Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Indicators and Gauges [Member]
Net Sales
Revenue	$ 332,771	$ 460,749	$ 933,707	$ 1,211,350
Income (Loss) before provision for Income Taxes
Income (Loss) before provision for Income Taxes	54,783	138,030	119,379	227,434
Asset Information
Assets	721,504	800,751	721,504	800,751
Revenue:
Revenue	332,771	460,749	933,707	1,211,350
Automotive Diagnostic Tools and Equipment [Member]
Net Sales
Revenue	1,471,843	1,669,663	3,124,307	3,085,771
Income (Loss) before provision for Income Taxes
Income (Loss) before provision for Income Taxes	294,830	531,969	172,283	430,759
Asset Information
Assets	1,705,065	2,836,401	1,705,065	2,836,401
Revenue:
Revenue	1,471,843	1,669,663	3,124,307	3,085,771
Corporate Segment [Member]
Income (Loss) before provision for Income Taxes
Income (Loss) before provision for Income Taxes	(239,982)	(283,088)	(729,350)	(889,224)
Asset Information
Assets	829,397	567,551	829,397	567,551
UNITED STATES
Net Sales
Revenue	1,739,642	2,103,243	3,935,224	4,201,849
Revenue:
Revenue	1,739,642	2,103,243	3,935,224	4,201,849
AUSTRALIA
Net Sales
Revenue	1,602	5,996	13,402	30,134
Revenue:
Revenue	1,602	5,996	13,402	30,134
CANADA
Net Sales
Revenue	21,487	14,197	57,041	35,911
Revenue:
Revenue	21,487	14,197	57,041	35,911
MEXICO
Net Sales
Revenue	7,283	6,976	17,747	25,288
Revenue:
Revenue	7,283	$ 6,976	17,747	$ 25,288
CHINA
Net Sales
Revenue	29,657		29,657
Revenue:
Revenue	29,657		29,657
Other Foreign Countries [Member]
Net Sales
Revenue	4,943		4,943	$ 3,939
Revenue:
Revenue	4,943		4,943	3,939
Revenue	1,804,614	$ 2,130,412	4,058,014	4,297,121
Income (Loss) before provision for Income Taxes	109,631	386,911	(437,688)	(231,031)
Assets	3,255,966	4,204,703	3,255,966	4,204,703
Revenue	$ 1,804,614	$ 2,130,412	$ 4,058,014	$ 4,297,121