Note 2 - Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Allowance for Doubtful Accounts	$ 250,000	$ 250,000	$ 200,000
Allowance for doubtful accounts	61,000	41,000	144,000
Allowance for doubtful accounts	(61,000)	(41,000)	(94,000)
Allowance for Doubtful Accounts	$ 250,000	$ 250,000	$ 250,000