Note 1 - Summary of Company's Product Classes (Details)	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Automotive Test Equipment [Member]
Product Classes	77.80%	76.30%	74.40%
Indicating Instruments [Member]
Product Classes	22.20%	23.70%	25.60%
Product Classes	100.00%	100.00%	100.00%