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

3 Months Ended

Sep. 30, 2018

Notes Tables

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

Exercise Price	$	1.20		-	$	1.22
Risk free interest rate		2.32	%	-		2.93	%
Expected volatility		130	%	-		200	%
Remaining Term (years)		0.47		-		4.82

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

				Convertible
	Warrants			Notes		Total
Balance - June 30, 2018	$	505,069		$	818,556	$	1,323,625
Change in fair value of derivative liabilities		(64,333	)		(444,291)		(508,624)
Balance - September 30, 2018	$	440,736		$	374,265	$	815,001

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

	Fair value		Level 1		Level 2		Level 3
June 30, 2018 Derivative liabilities	$	1,323,625	$	-	$	-	$	1,323,625
September 30, 2018 Derivative liabilities	$	815,001	$	-	$	-	$	815,001