Note 2 - Significant Accounting Policies (Details)	3 Months Ended
	Sep. 30, 2015
Centerpoint [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Equity Method Investment, Ownership Percentage	58.90%
Minimum [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	20 years