Note 13 - Equity Transactions and Stock-based Compensation - Summary of the Company's Stock Option Activity, and Related Information (Details) - $ / shares	1 Months Ended	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Balance (in shares)		3,072,950	1,724,520
Balance (in dollars per share)		$ 0.52	$ 4.07
Granted (in shares)	2,248,000	0	2,248,000
Granted (in dollars per share)		$ 0	$ 0.09
Exercised (in shares)		0	0
Exercised (in dollars per share)		$ 0	$ 0
Terminated (in shares)		(80,000)	(18,000)
Terminated (in dollars per share)		$ 0.17	$ 1.11
Expired (in shares)		(122,000)	(881,570)
Expired (in dollars per share)		$ 3.63	$ 6.36
Balance (in shares)	3,072,950	2,870,950	3,072,950
Balance (in dollars per share)	$ 0.52	$ 0.40	$ 0.52
Exercisable at June 30, 2015 (in shares)	2,164,550	2,383,617	2,164,550
Exercisable at June 30, 2015 (in dollars per share)	$ 0.70	$ 0.46	$ 0.70