Note 7 - Summary of Expired Director Plans (Details)	9 Months Ended
	Jun. 30, 2016 $ / shares shares
Exercise Price Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 2.925
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 5.25
Outstanding stock options (in shares) | shares	4,000
Outstanding, weighted average share price (in dollars per share)	$ 2.925
Weighted average remaining life	5 years 182 days
Number of stock options exercisable (in shares) | shares	4,000
Exercisable, weighted average share price (in dollars per share)	$ 2.925
Exercise Price Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 6
Outstanding stock options (in shares) | shares	1,000
Outstanding, weighted average share price (in dollars per share)	$ 6
Weighted average remaining life	3 years 292 days
Number of stock options exercisable (in shares) | shares	1,000
Exercisable, weighted average share price (in dollars per share)	$ 6
Outstanding stock options (in shares) | shares	5,000
Outstanding, weighted average share price (in dollars per share)	$ 3.54
Number of stock options exercisable (in shares) | shares	5,000
Exercisable, weighted average share price (in dollars per share)	$ 3.54