Note 6 - Defined Benefit Pension Plan (Details)	Sep. 30, 2015 USD ($)
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Pension Plan, Liabilities	$ 0

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit pension plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant