Note 2 - Summary of Significant Accounting Policies - Calculation for Basic and Diluted Earnings Per Share (Details) - shares		9 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Anti-dilutive securities (in shares)		5,237,145	8,671,964
Convertible Debt Securities [Member]
Anti-dilutive securities (in shares)			3,676,471
Vested Series A Warrants [Member]
Anti-dilutive securities (in shares)		404,410	404,410
Unvested Series A Warrants [Member]
Anti-dilutive securities (in shares)	[1]	698,529	698,529
Warrant, Other [Member]
Anti-dilutive securities (in shares)		3,725,782	3,725,782
Employee Stock Option [Member]
Anti-dilutive securities (in shares)		334,190	110,452
Restricted Stock Units (RSUs) [Member]
Anti-dilutive securities (in shares)		74,234	56,320

[1] The unvested Series A warrants were subject to vesting based upon the amount of funds actually received by the Company in the second close of the August 2015 financing which never occurred. The warrants will remain outstanding but unvested until they expire in February 2021.