Note 1 - Principles of Consolidation and Basis of Presentation - Antidilutive Securities Excluded From Weighted Average Diluted Common Shares Outstanding (Details) - shares	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Anti-dilutive securities (in shares)	10,727,519	11,165,885	10,727,519	8,621,802
Employee Stock Option [Member]
Anti-dilutive securities (in shares)	2,496,750	2,935,116	2,496,750	391,033
Convertible Debt Securities [Member]
Anti-dilutive securities (in shares)	8,230,769	8,230,769	8,230,769	8,230,769