Note 7 - Stockholders' Equity (Tables)

6 Months Ended

Dec. 31, 2020

Notes Tables

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

	Weighted Average, December 31, 2020			Range, December 31, 2020			Weighted Average, December 31, 2019			Range, December 31, 2019
Volatility		-	%		-	%		68	%		68%	-	70%
Dividend yield					—			—				—
Risk-free interest rate		-	%		-	%		1.75	%		1.74%	-	1.75%
Expected term (years)		-			-			5.0			5.0	to	5.2

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life		Aggregate Intrinsic Value
Outstanding at July 1, 2020		9,511,600	$	0.74		4.5	$	-
Granted		-		-
Exercised		-		-
Forfeited		-		-
Expired		-		-
Outstanding at December 31, 2020		9,511,600	$	0.74		4.0	$	-
Exercisable at December 31, 2020		9,511,600	$	0.74		4.0	$	-

Schedule of Nonvested Share Activity [Table Text Block]

	Options		Weighted Average Grant-Date Fair Value
Nonvested at July 1, 2020		-	$	-
Granted		-		-
Vested		-		-
Nonvested at December 31, 2020		—	$	—

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three months ended December 31, 2020		Three months ended December 31, 2019		Six months ended December 31, 2020		Six months ended December 31, 2019
General and administrative:
Change in fair value from modification of  option terms	$	8,775	$	-	$	8,775	$	-
Change in fair value from modification of  warrant terms		25,506		-		25,506		-
Fair value of stock options expensed		-		92,000		-		92,000
Total	$	34,281	$	92,000	$	34,281	$	92,000
Research and development:
Fair value of stock options expensed	$	-	$	7,500	$	-	$	7,500
Total	$	-	$	7,500	$	-	$	7,500