Note 10 - Fair Value Measurements and Other Financial Instruments (Tables)

12 Months Ended

Jun. 30, 2018

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

Exercise Price	$1.20	–	$1.22
Risk free interest rate	2.30%	-	2.70%
Expected volatility	123.0%	-	194.0%
Remaining term (in years)	0.72	–	5.07

Schedule of Derivative Liabilities at Fair Value [Table Text Block]

			Convertible
	Warrants		Notes		Total
Balance - June 30, 2017	$	435,036	$	116,004	$	551,040
Change in fair value of derivative liabilities		70,033		702,552		772,585
Balance - June 30, 2018	$	505,069	$	818,556	$	1,323,625

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

	Fair value		Level 1		Level 2		Level 3
June 30, 2017 Derivative liabilities	$	551,040	$	-	$	-	$	551,040
June 30, 2018 Derivative liabilities	$	1,323,625	$	-	$	-	$	1,323,625