Note 12 - Segment and Related Information (Details) - Asset information by industry segment: (USD $)	Sep. 30, 2013	Sep. 30, 2012
Identifiable Assets
Segment Identifiable Assets	$ 3,504,683	$ 3,205,971
Total [Member]
Identifiable Assets
Segment Identifiable Assets	3,504,683	3,205,971
Indicators and Gauges [Member]
Identifiable Assets
Segment Identifiable Assets	898,555	850,186
Automotive Diagnostic Tools and Equipment [Member]
Identifiable Assets
Segment Identifiable Assets	1,327,932	1,586,634
Corporate Segment [Member]
Identifiable Assets
Segment Identifiable Assets	$ 1,278,196	$ 769,151