5. REVENUE RECOGNITION (Tables)

9 Months Ended

12 Months Ended

Mar. 31, 2020

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of revenues

Revenues are comprised of the following for the three and nine months ended March 31, 2020 and 2019:

	Three Months Ended March 31,				Nine Months Ended March 31,
	2020		2019		2020		2019
Engineering Design Services	$	210,065	$	61,833	$	1,098,234	$	892,472
Optical Components		1,479,322		250,405		4,428,409		774,429
Medical Device Products and Assemblies		685,197		1,074,216		2,159,687		2,756,862
Total Revenues	$	2,374,584	$	1,386,454	$	7,686,330	$	4,423,763

	2019		2018
Engineering Design Services	$	1,313,543	$	1,283,534
Optical Components		1,821,889		1,226,190
Medical Device Products and Assemblies		3,668,737		1,528,324
Total Revenues	$	6,804,169	$	4,038,048

Contract Liabilities

Contract liabilities, which were recorded as customer advances in the Company’s Consolidated Balance Sheets, and unearned revenue are comprised of the following:

	Three Months Ended March 31,						Nine Months Ended March 31,
	2020			2019			2020			2019
Contract liabilities, beginning of period	$	388,506		$	294,650		$	450,192		$	857,842
Unearned revenue received from customers		41,874			61,928			334,893			81,684
Revenue recognized		(119,855	)		(97,650	)		(474,560	)		(680,598	)
Contract liabilities, end of period	$	310,525		$	258,928		$	310,525		$	258,928