6. REVENUE RECOGNITION (Details - Contract liabilities) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract liabilities, beginning balance	$ 206,665	$ 513,623	$ 417,059	$ 450,192
Unearned revenue received from customers	127,571	97,143	171,703	293,019
Revenue recognized in current period	(182,359)	(222,260)	(436,885)	(354,705)
Contract liabilities, ending balance	$ 151,877	$ 388,506	$ 151,877	$ 388,506