Note 9 - Stockholders' Equity (Tables)

6 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Weighted Average, December 31, 2015		Range, December 31, 2015		Weighted Average, December 31, 2014		Range, December 31, 2014
Volatility		74%		74%		80%		80%
Dividend yield		-		-		-		-
Risk-free interest rate		1.75%		1.75%		0.51%		0.51%
Expected term (years)		5		5		2		2

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life		Aggregate Intrinsic Value
Outstanding at July 1, 2015		4,413,870	$	1.88		4.1		-
Granted		100,000		0.92
Exercised		-		-
Forfeited		-		-
Expired		-		-
Outstanding at December 31, 2015		4,513,870	$	1.86		3.9	$	36,050
Exercisable at December 31, 2015		4,413,870	$	1.89		3.7	$	22,050

Schedule of Nonvested Share Activity [Table Text Block]

	Options			Weighted Average Grant-Date Fair Value
Nonvested at July 1, 2015		100,000		$	0.76
Granted		100,000			0.59
Vested		(100,000	)		(0.59	)
Nonvested at December 31, 2015		100,000		$	0.76

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three months ended December 31, 2015		Three months ended December 31, 2014		Six months ended December 31, 2015		Six months ended December 31, 2014
General and administrative:
Fair value of stock bonus expensed	$	69,000	$	-	$	69,000	$	-
Change in fair value from modification of option terms		42,550		11,783		42,550		11,783
Fair value of stock options expensed		62,371		4,000		64,209		4,000
Total	$	173,921	$	15,783	$	175,759	$	15,783
Research and development:
Fair value of stock options expensed	$	11,949	$	-	$	25,431	$	-
Total	$	11,949	$	-	$	25,431	$	-