Note 9 - Segment and Related Information (Details) - Information by industry segment is set forth below: (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012
Net Revenue
Net Sales	$ 1,339,931	$ 1,271,803	$ 5,043,172	$ 3,631,842
Income (Loss) before provision for Income Taxes
Income (Loss) before Provision for Income Taxes	(133,777)	(170,975)	129,458	(578,896)
Asset Information
Asset Information	3,443,740	3,216,865	3,443,740	3,216,865	3,205,971
Indicators and Gauges [Member]
Net Revenue
Net Sales	432,912	537,903	1,260,745	1,268,278
Income (Loss) before provision for Income Taxes
Income (Loss) before Provision for Income Taxes	109,648	115,290	334,488	216,880
Asset Information
Asset Information	909,801	772,433	909,801	772,433
Automotive Diagnostic Tools and Equipment [Member]
Net Revenue
Net Sales	907,019	733,900	3,782,427	2,363,564
Income (Loss) before provision for Income Taxes
Income (Loss) before Provision for Income Taxes	31,741	(53,096)	636,641	(114,052)
Asset Information
Asset Information	1,377,016	1,444,989	1,377,016	1,444,989
General Corporate Expenses [Member]
Income (Loss) before provision for Income Taxes
Income (Loss) before Provision for Income Taxes	(275,166)	(233,169)	(841,671)	(681,724)
Total [Member]
Income (Loss) before provision for Income Taxes
Income (Loss) before Provision for Income Taxes	(133,777)	(170,975)	129,458	(578,896)
Asset Information
Asset Information	3,443,740	3,216,865	3,443,740	3,216,865
Corporate Segment [Member]
Asset Information
Asset Information	1,156,923	999,443	1,156,923	999,443
United States [Member]
Revenue:
Geographical Information - Revenue	1,323,179	1,255,112	4,919,864	3,511,387
Australia [Member]
Revenue:
Geographical Information - Revenue			14,231	35,609
Canada [Member]
Revenue:
Geographical Information - Revenue	16,752	8,799	67,450	22,551
England [Member]
Revenue:
Geographical Information - Revenue			5,245
Mexico [Member]
Revenue:
Geographical Information - Revenue		3,360	10,536	23,520
Taiwan [Member]
Revenue:
Geographical Information - Revenue		1,270	22,481	34,935
Other Foreign Countries [Member]
Revenue:
Geographical Information - Revenue		3,262	3,365	3,840
Total [Member]
Revenue:
Geographical Information - Revenue	$ 1,339,931	$ 1,271,803	$ 5,043,172	$ 3,631,842