Note 2 - Summary of Significant Accounting Policies - Calculation for Basic and Diluted Earnings Per Share (Details) - shares		6 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Anti-dilutive securities (in shares)		5,215,737	2,548,096
Convertible Debt Securities [Member]
Anti-dilutive securities (in shares)			404,412
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
Vested Series B Warrants [Member]
Anti-dilutive securities (in shares)			197,242
Unvested Series B Warrants [Member]
Anti-dilutive securities (in shares)			384,191
Warrant, Other [Member]
Anti-dilutive securities (in shares)		3,725,782	252,620
Employee Stock Option [Member]
Anti-dilutive securities (in shares)		321,868	146,838
Restricted Stock Units (RSUs) [Member]
Anti-dilutive securities (in shares)		65,148	59,854

[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.