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15. INCOME TAXES (Details Narrative) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]      
Income Tax Expense (Benefit) $ 0 $ 0 $ 0
Other Information Pertaining to Income Taxes During 2021, $31.2 million federal net operating losses and $456,000 general business credits expired unused    
Operating Loss Carryforwards, Limitations on Use In certain circumstances, as specified in the Internal Revenue Code, a 50% or more ownership change by certain combinations of our shareholders during any three year period would result in limitations on our ability to use a portion of our net operating loss carryforwards.    
Unrecognized Tax Benefits $ 0 0  
Income Tax Examination, Penalties and Interest Expense $ 0 $ 0 $ 0
Open Tax Year 1998    
Minimum [Member]      
Operating Loss Carryforwards [Line Items]      
Tax Credit Carryforward, Expiration Date Dec. 31, 2022    
Maximum [Member]      
Operating Loss Carryforwards [Line Items]      
Tax Credit Carryforward, Expiration Date Dec. 31, 2041    
Research Tax Credit Carryforward [Member]      
Operating Loss Carryforwards [Line Items]      
Tax Credit Carryforward, Amount $ 9,000,000.0    
Domestic Tax Authority [Member]      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards $ 431,400,000