6. REVENUE RECOGNITION (Details - Revenues) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 2,785,450	$ 2,796,762	$ 5,543,351	$ 5,311,746
Engineering Design Services [Member]
Revenues	847,988	478,441	1,437,220	888,169
Optical Components [Member]
Revenues	1,398,213	1,532,843	2,874,298	2,949,087
Medical Device Products and Assemblies [Member]
Revenues	$ 539,249	$ 785,478	$ 1,231,833	$ 1,474,490