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6. CASH AND CASH EQUIVALENTS (Details Narrative)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash and cash equivalents1 [line items]      
Percentage of fixed interest rate 1.89% 4.39% 6.39%
Top of Range [member]      
Cash and cash equivalents1 [line items]      
Percentage of accrued interest on certificate of deposits 108.00% 106.00% 106.00%
Bottom Of Range [member]      
Cash and cash equivalents1 [line items]      
Percentage of accrued interest on certificate of deposits 50.00% 80.00% 40.00%