Note 9 - Segment and Related Information (Details) - Information by industry segment is set forth below: (USD $)	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012	Sep. 30, 2013
Net Sales
Net Sales	$ 1,050,242	$ 1,050,242	$ 1,738,903	$ 1,738,903
Income (Loss) before Provision for Income Taxes
Income (Loss) before Provision for Income Taxes		(320,287)		143,804
Asset Information
Asset Information	3,181,813	3,181,813	3,588,517	3,588,517	3,504,683
Indicators and Gauges [Member]
Net Sales
Net Sales	404,405		410,226
Income (Loss) before Provision for Income Taxes
Income (Loss) before Provision for Income Taxes	65,634		111,624
Asset Information
Asset Information	922,325	922,325	831,059	831,059
Automotive Diagnostic Tools and Equipment [Member]
Net Sales
Net Sales	645,837		1,328,677
Income (Loss) before Provision for Income Taxes
Income (Loss) before Provision for Income Taxes	(87,070)		307,465
Asset Information
Asset Information	1,235,229	1,235,229	2,167,252	2,167,252
General Corporate Expenses [Member]
Income (Loss) before Provision for Income Taxes
Income (Loss) before Provision for Income Taxes	(298,851)		(275,285)
Total [Member]
Income (Loss) before Provision for Income Taxes
Income (Loss) before Provision for Income Taxes	(320,287)		143,804
Asset Information
Asset Information	3,181,813	3,181,813	3,588,517	3,588,517
Corporate Segment [Member]
Asset Information
Asset Information	1,024,259	1,024,259	590,206	590,206
United States [Member]
Revenue:
Geographical Information - Revenue	1,004,148		1,700,435
Australia [Member]
Revenue:
Geographical Information - Revenue	24,138
Canada [Member]
Revenue:
Geographical Information - Revenue	11,492		28,054
Mexico [Member]
Revenue:
Geographical Information - Revenue	10,464		7,048
Other Foreign Countries [Member]
Revenue:
Geographical Information - Revenue			3,366
Total [Member]
Revenue:
Geographical Information - Revenue	$ 1,050,242		$ 1,738,903