Note 8 - Income Taxes (Details Textual) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Domestic Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 37,400,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	16,100,000
Expired in 2020 [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	77,000
Liability for Uncertainty in Income Taxes, Current	0	$ 0
Income Tax Examination, Penalties and Interest Accrued	$ 0	$ 0