Note 12 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 14,412	$ 15,045	$ 16,979

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration