4. STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of stock-based compensation expense

	Three Months Ended September 30,
	2019		2018
Cost of Goods Sold	$	11,233	$	–
Research and Development Expenses		12,684		2,411
Selling, General and Administrative Expenses		52,588		130,573
Stock Based Compensation Expense	$	76,505	$	132,984

Stock option activity

	Options Outstanding
	Number of Shares			Weighted Average Exercise Price		Weighted Average Contractual Life
Outstanding at June 30, 2019		1,819,500		$	0.87		7.05 years
Granted		200,000
Exercised		(12,500	)
Outstanding at September 30, 2019		2,007,000		$	0.92		7.16 years

Stock options outstanding by exercise price range

Range of Exercise Prices		Number of Shares		Weighted- Average Remaining Contractual Life (years)		Weighted- Average Exercise Price		Exercisable Number of Shares		Exercisable Weighted- Average Exercise Price
$	0.27		40,000		1.79	$	0.27		40,000	$	0.27
$	0.40		15,000		7.58	$	0.40		15,000	$	0.40
$	0.48		60,000		6.50	$	0.48		60,000	$	0.48
$	0.50		100,000		5.73	$	0.50		100,000	$	0.50
$	0.55		44,000		4.46	$	0.55		39,000	$	0.55
$	0.64		25,000		8.12	$	0.64		15,000	$	0.64
$	0.70		100,000		8.85	$	0.70		100,000	$	0.70
$	0.73		791,000		7.05	$	0.73		621,500	$	0.73
$	0.85		6,000		3.26	$	0.85		6,000	$	0.85
$	0.90		6,000		4.26	$	0.90		6,000	$	0.90
$	0.95		30,000		4.78	$	0.95		30,000	$	0.95
$	1.20		207,800		2.42	$	1.20		207,800	$	1.20
$	1.30		481,000		9.70	$	1.30		–	$	1.30
$	1.35		1,200		0.15	$	1.35		1,200	$	1.35
$	1.42		100,000		9.95	$	1.42		–	$	1.42
$	0.27–$1.42		2,007,000		7.16	$	0.92		1,241,500	$	0.76