Note 12 - Equity Transactions and Stock-based Compensation (Tables)

12 Months Ended

Jun. 30, 2020

Notes Tables

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

Risk Free Interest Rate		2.12% to 2.29	%
Volatility		81.1% to 90.3	%
Term	4 1/2 to 10 years
Dividend Rate		0.00	%
Closing Price of Common Stock	$	0.21

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

				Weighted
				Average
				Exercise
	Options			Price
Outstanding as of July 1, 2018		2,439,250		$	0.29
Granted		1,883,000			0.21
Exercised		(200,000	)		0.12
Terminated		(17,500	)		0.18
Expired		(343,250	)		0.14
Outstanding as of June 30, 2019		3,761,500			0.16
Granted		-			-
Exercised		(80,000	)		0.09
Terminated		(137,500	)		0.14
Expired		(200,000	)		0.10
Outstanding as of June 30, 2020		3,344,000		$	0.16
Exercisable at June 30, 2019		2,863,800		$	0.14
Exercisable at June 30, 2020		2,875,533		$	0.16

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

									Weighted
									Average
							Weighted		Remaining				Weighted
							Average		Contractual				Average
Range of Exercise Price					Outstanding		Exercise Price		Life (years)		Exercisable		Exercise Price
$	0.09	-	$	0.10		1,386,000	$	0.09		4.9		1,386,000	$	0.09
$	0.21	-	$	0.21		1,408,000		0.21		8.9		1,022,867		0.21
$	0.23	-	$	0.25		550,000		0.23		6.4		466,666		0.23
$	0.09	-	$	0.25		3,344,000	$	0.16		7.7		2,875,533	$	0.16