Note 9 - Information by Industry Segment (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Indicators and Gauges [Member]
Net Sales
Revenue	$ 242,123	$ 245,669
Income (Loss) before Provision for Income Taxes
Income (Loss) before provision for Income Taxes	31,074	2,493
Asset Information
Assets	706,460	704,441
Revenue:
Revenue	242,123	245,669
Automotive Diagnostic Tools and Equipment [Member]
Net Sales
Revenue	1,134,749	916,549
Income (Loss) before Provision for Income Taxes
Income (Loss) before provision for Income Taxes	171,233	(31,388)
Asset Information
Assets	1,652,603	1,462,089
Revenue:
Revenue	1,134,749	916,549
Corporate Segment [Member]
Income (Loss) before Provision for Income Taxes
Income (Loss) before provision for Income Taxes	(249,496)	(241,761)
Asset Information
Assets	1,207,628	1,179,835
UNITED STATES
Net Sales
Revenue	1,329,619	1,127,459
Revenue:
Revenue	1,329,619	1,127,459
AUSTRALIA
Net Sales
Revenue	38,353	8,125
Revenue:
Revenue	38,353	8,125
CANADA
Net Sales
Revenue	8,900	19,658
Revenue:
Revenue	$ 8,900	19,658
MEXICO
Net Sales
Revenue		6,976
Revenue:
Revenue		$ 6,976
Other Foreign Countries [Member]
Net Sales
Revenue
Revenue:
Revenue
Revenue	$ 1,376,872	$ 1,162,218
Income (Loss) before provision for Income Taxes	(47,189)	(270,656)
Assets	3,566,691	3,346,365
Revenue	$ 1,376,872	$ 1,162,218