8. INCOME TAXES (Details - Tax rates)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax benefit at federal statutory rate	(21.00%)	(21.00%)
State taxes, net of federal expense	(0.50%)	0.10%
Valuation allowance	19.98%	25.08%
Research and development credits	0.79%	(3.87%)
Other permanent differences	0.44%	0.31%
Other , net	0.00%	(0.42%)
Total effective rate	(0.29%)	0.20%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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