Note 10 - Income Taxes - Table of Estimated Deferred Tax Assets and Liabilities (Details) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
NOLs – noncurrent	$ 19,705,000	$ 19,083,000
Stock-based compensation - current	5,392,000	5,255,000
Property and equipment – noncurrent	2,014,000	1,390,000
Deferred compensation - noncurrent	1,688,000	1,383,000
Gross deferred tax assets	28,799,000	27,111,000
Valuation allowance	(28,799,000)	(27,111,000)
Net deferred tax assets