Note 1 - Nature of Operations (Detail) - Summary of Company's product classes:	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Products classes	100.00%	100.00%	100.00%
Automotive Test Equipment [Member]
Products classes	66.10%	75.30%	74.20%
Indicating Instruments [Member]
Products classes	33.90%	24.70%	25.80%