REVENUE RECOGNITION (Tables)

3 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of revenues

	Three Months Ended September 30,
	2021		2020
Engineering Design Services	$	373,316	$	589,232
Optical Components		1,538,932		1,476,085
Medical Device Products & Assemblies		424,096		692,584
	$	2,336,344	$	2,757,901

Contract Liabilities

	Three Months Ended September 30,
	2021			2020
Contract liabilities, beginning of period	$	450,084		$	417,059
Unearned revenue received from customers		205,389			44,132
Revenue recognized		(318,901	)		(254,526	)
Contract liabilities, end of period	$	336,572		$	206,665