18. INCOME TAXES (Details-Deferred tax assets and liabilities) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Reserve for bad debt	$ 0	$ 680
Stock options	574,365	760,763
Deferred Revenue	31,070	24,077
Other	86,457	59,947
Net operating loss carryforward	10,012,021	8,996,569
Total gross deferred tax assets	10,703,913	9,842,036
Less: Deferred tax asset valuation allowance	(10,656,461)	(9,827,176)
Total net deferred tax assets	47,452	14,860
Deferred tax liabilities:
Depreciation	(47,452)	(14,860)
Total deferred tax liabilities	(47,452)	(14,860)
Total net deferred taxes	$ 0	$ 0