5. REVENUE RECOGNITION (Tables)

6 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of revenues

	Three Months Ended December 31,				Six Months Ended December 31,
	2019		2018		2019		2018
Engineering Design Services	$	478,441	$	318,741	$	888,169	$	830,639
Optical Components		1,532,843		225,967		2,949,087		524,024
Medical Device Products and Assemblies		785,478		933,143		1,474,490		1,682,646
Total Revenues	$	2,796,762	$	1,477,851	$	5,311,746	$	3,037,309

Contract Liabilities

	Three Months Ended December 31,						Six Months Ended December 31,
	2019			2018			2019			2018
Contract liabilities, beginning of period	$	513,623		$	400,704		$	450,192		$	857,842
Unearned revenue received from customers		97,143			–			293,019			24,300
Revenue recognized		(222,260	)		(192,722	)		(354,705	)		(674,160	)
Contract liabilities, end of period	$	388,506		$	207,982		$	388,506		$	207,982