Note 11 - Effect of 1% Change in Assumed Health Care Cost Trend Rates (Details) - USD ($)	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Effect on total of service and interest cost	$ 0	$ 35,000	$ 91,000
Effect on postretirement benefit obligation	4,000	7,000	1,041,000
Effect on total of service and interest cost	0	(30,000)	(77,000)
Effect on postretirement benefit obligation	$ (4,000)	$ (7,000)	$ (881,000)

Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (m)

-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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- Definition

The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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