Note 1 - Nature of Operations (Details) - Summary of Company's product classes:	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Products classes	100.00%	100.00%	100.00%
Automotive Test Equipment [Member]
Segment Reporting Information [Line Items]
Products classes	74.40%	66.10%	75.30%
Indicating Instruments [Member]
Segment Reporting Information [Line Items]
Products classes	25.60%	33.90%	24.70%