Note 12 - Actual Asset Allocation For The Assets Within The Company's Plans (Details)	Jun. 30, 2016	Jun. 30, 2015
Cash and Cash Equivalents [Member]
Asset category:
Asset allocation	0.00%	1.00%
Fixed Income Securities [Member]
Asset category:
Asset allocation	18.00%	17.00%
Equity Securities [Member]
Asset category:
Asset allocation	27.00%	25.00%
Mutual and Pooled Funds [Member]
Asset category:
Asset allocation	55.00%	57.00%
Asset allocation	100.00%	100.00%